diff --git a/.changelogs/feature_quiz-resume-4.yml b/.changelogs/feature_quiz-resume-4.yml
new file mode 100644
index 0000000000..a86a9cfe7c
--- /dev/null
+++ b/.changelogs/feature_quiz-resume-4.yml
@@ -0,0 +1,4 @@
+significance: patch
+type: fixed
+entry: Fixed reference in `LLMS_Ajax_Handler::quiz_start()` to
+  `LLMS_Quiz_Attempt::get_status()` method removed since LifterLMS 4.0.0.
diff --git a/.changelogs/feature_quiz-resume-akash-3.yml b/.changelogs/feature_quiz-resume-akash-3.yml
new file mode 100644
index 0000000000..f979f75b7c
--- /dev/null
+++ b/.changelogs/feature_quiz-resume-akash-3.yml
@@ -0,0 +1,3 @@
+significance: minor
+type: changed
+entry: Added support for image upload in Result Clarifications box for quizzes.
diff --git a/.changelogs/feature_quiz-resume-akash-5.yml b/.changelogs/feature_quiz-resume-akash-5.yml
new file mode 100644
index 0000000000..5efe2f8866
--- /dev/null
+++ b/.changelogs/feature_quiz-resume-akash-5.yml
@@ -0,0 +1,4 @@
+significance: minor
+type: dev
+entry: Added filter `llms_quiz_attempt_resume_time_period` for updating quiz resume
+  allowed time period.
diff --git a/.changelogs/feature_quiz-resume.yml b/.changelogs/feature_quiz-resume.yml
new file mode 100644
index 0000000000..0e4979123b
--- /dev/null
+++ b/.changelogs/feature_quiz-resume.yml
@@ -0,0 +1,3 @@
+significance: minor
+type: added
+entry: "Added new feature: Quiz Resume."
diff --git a/assets/js/builder/Models/Quiz.js b/assets/js/builder/Models/Quiz.js
index 4251c5848c..71be58af24 100644
--- a/assets/js/builder/Models/Quiz.js
+++ b/assets/js/builder/Models/Quiz.js
@@ -52,6 +52,7 @@ define( [
 		 * @since 3.16.0
 		 * @since 7.4.0 Added filter for filtering defaults.
 		 * @since 7.5.0 Replaced unused `random_answers` property with `random_questions`.
+		 * @since [version] Added filter for filtering defaults and `can_be_resumed` property.
 		 *
 		 * @return {Object}
 		 */
@@ -75,6 +76,7 @@ define( [
 				random_questions: 'no',
 				time_limit: 30,
 				show_correct_answer: 'no',
+				can_be_resumed: 'no',
 				disable_retake: 'no',
 
 				questions: [],
diff --git a/assets/js/builder/Schemas/Quiz.js b/assets/js/builder/Schemas/Quiz.js
index 31d13a8483..3c0b53b0d2 100644
--- a/assets/js/builder/Schemas/Quiz.js
+++ b/assets/js/builder/Schemas/Quiz.js
@@ -4,7 +4,9 @@
  * @since 3.17.6
  * @since 7.4.0 Added upsell for Question Bank and condition in `random_questions` schema.
  * @since 7.6.2 Added `disable_retake` schema.
- * @version 7.6.2
+ * @since [version] Added `can_be_resumed` option.
+ * @version [version]
+
  */
 define( [], function() {
 
@@ -56,6 +58,17 @@ define( [], function() {
 						type: 'switch-number',
 			},
 				], [
+
+					{
+						attribute: 'can_be_resumed',
+						id: 'resume',
+						label: LLMS.l10n.translate( 'Can be resumed' ),
+						tip: LLMS.l10n.translate( 'Allow a new attempt on this quiz to be resumed' ),
+						type: 'switch',
+						condition: function() {
+							return 'yes' === this.get( 'limit_time' ) ? false : true;
+						}
+			},
 					{
 						attribute: 'show_correct_answer',
 						id: 'show-correct-answer',
diff --git a/assets/js/builder/Views/Question.js b/assets/js/builder/Views/Question.js
index a91ee52382..c911397d99 100644
--- a/assets/js/builder/Views/Question.js
+++ b/assets/js/builder/Views/Question.js
@@ -1,7 +1,8 @@
 /**
- * Single Question View
- * @since    3.16.0
- * @version  3.27.0
+ * Single Question View.
+ *
+ * @since 3.16.0
+ * @version [version]
  */
 define( [
 		'Views/_Detachable',
@@ -82,10 +83,12 @@ define( [
 		},
 
 		/**
-		 * Compiles the template and renders the view
-		 * @return   self (for chaining)
-		 * @since    3.16.0
-		 * @version  3.16.0
+		 * Compiles the template and renders the view.
+		 *
+		 * @since 3.16.0
+		 * @since [version] Added support for image upload in tinyMCE editor.
+		 *
+		 * @return self (for chaining)
 		 */
 		render: function() {
 
@@ -124,7 +127,7 @@ define( [
 
 			if ( this.model.get( 'clarifications_enabled' ) ) {
 				this.init_editor( 'question-clarifications--' + this.model.get( 'id' ), {
-					mediaButtons: false,
+					mediaButtons: true,
 					tinymce: {
 						toolbar1: 'bold,italic,strikethrough,bullist,numlist,alignleft,aligncenter,alignright',
 						toolbar2: '',
diff --git a/assets/js/llms-quiz.js b/assets/js/llms-quiz.js
index 3c46bc1324..3398afb37c 100644
--- a/assets/js/llms-quiz.js
+++ b/assets/js/llms-quiz.js
@@ -2,11 +2,12 @@
 /* jshint strict: true */
 
 /**
- * Front End Quiz Class
+ * Front End Quiz Class.
  *
- * @type     {Object}
- * @since    1.0.0
- * @version  3.24.3
+ * @type {Object}
+ *
+ * @since 1.0.0
+ * @version [version]
  */( function( $ ) {
 
 	var quiz = {
@@ -14,93 +15,111 @@
 		/**
 		 * Selector of all the available button elements
 		 *
-		 * @type  obj
+		 * @type {Object}
 		 */
 		$buttons: null,
 
 		/**
-		 * Main Question Container Element
+		 * Main Question Container Element.
 		 *
-		 * @type  obj
+		 * @type {Object}
 		 */
 		$container: null,
 
 		/**
-		 * Main Quiz container UI element
+		 * Main Quiz container UI element.
 		 *
-		 * @type  obj
+		 * @type {Object}
 		 */
 		$ui: null,
 
 		/**
-		 * Attempt key for the current quiz
+		 * Attempt key for the current quiz.
 		 *
-		 * @type  {[type]}
+		 * @type {[type]}
 		 */
 		attempt_key: null,
 
 		/**
-		 * Question ID of the current question
+		 * Question ID of the current question.
 		 *
-		 * @type  {Number}
+		 * @type {Number}
 		 */
 		current_question: 0,
 
 		/**
-		 * Total number of questions in the current quiz
+		 * Total number of questions in the current quiz.
 		 *
-		 * @type  {Number}
+		 * @type {Number}
 		 */
 		total_questions: 0,
 
 		/**
-		 * Object of quiz question HTML
+		 * Object of quiz question HTML.
 		 *
-		 * @type  {Object}
+		 * @type {Object}
 		 */
 		questions: {},
 
 		/**
-		 * Validator functions for question types
-		 * Third party custom question types can register validators for use when answering questions
+		 * Validator functions for question type.
+		 * Third party custom question types can register validators for use when answering questions.
 		 *
-		 * @type  {Object}
+		 * @type {Object}
 		 */
 		validators: {},
 
 		/**
-		 * Records current status of a quiz session
+		 * Records current status of a quiz session.
 		 * If a user attempts to navigate away from a quiz
 		 * while taking the quiz they'll be warned that their progress
-		 * will not be saved if this status is not null
+		 * will not be saved if this status is not null.
 		 *
-		 * @type  boolean
+		 * @type {Bool}
 		 */
 		status: null,
 
 		/**
-		 * Bind DOM events
+		 * Records if the quiz can be resumed.
+		 */
+		resumable: null,
+
+		/**
+		 * Flag if the user is exiting the quiz.
+		 */
+		exiting_quiz: false,
+
+		/**
+		 * Bind DOM events.
 		 *
-		 * @return void
-		 * @since    1.0.0
-		 * @version  3.16.6
+		 * @since 1.0.0
+		 * @since 3.16.6 Unknown.
+		 * @since [version] Add quiz resume and hide leave warning if quiz is resumable.
+		 *
+		 * @return {Void}
 		 */
 		bind: function() {
 
 			var self = this;
 
-			// start quiz
+			// Start quiz.
 			$( '#llms_start_quiz' ).on( 'click', function( e ) {
 				e.preventDefault();
 				self.start_quiz();
 			} );
 
-			// draw quiz grade circular chart
+			// Resume quiz.
+			$( '#llms_resume_quiz' ).on( 'click', function( e ) {
+				e.preventDefault();
+				self.resume_quiz();
+			} );
+
+			// Draw quiz grade circular chart.
 			$( '.llms-donut' ).each( function() {
 				LLMS.Donut( $( this ) );
 			} );
 
-			// redirect to attempt on attempt selection change
+			// Redirect to attempt on attempt selection change.
 			$( '#llms-quiz-attempt-select' ).on( 'change', function() {
 				var val = $( this ).val();
 				if ( val ) {
@@ -108,23 +127,25 @@
 				}
 			} );
 
-			// warn when quiz is running and user tries to leave the page
+			// Warn when quiz is running and user tries to leave the page when quiz is not resumable.
 			$( window ).on( 'beforeunload', function() {
-				if ( self.status ) {
+				if ( self.status && ! self.exiting_quiz ) {
 					return LLMS.l10n.translate( 'Are you sure you wish to quit this quiz attempt?' );
 				}
+
+				return;
 			} );
 
-			// complete the quiz attempt when user leaves if the quiz is running
+			// Complete the quiz attempt when user leaves if the quiz is running.
 			$( window ).on( 'unload', function() {
-				if ( self.status ) {
+				if ( self.status && ! self.resumable ) {
 					self.complete_quiz();
 				}
 			} );
 
 			$( document ).on( 'llms-post-append-question', self.post_append_question );
 
-			// register validators
+			// Register validators.
 			this.register_validator( 'content', this.validate );
 			this.register_validator( 'choice', this.validate_choice );
 			this.register_validator( 'picture_choice', this.validate_choice );
@@ -157,6 +178,45 @@
 
 		},
 
+		save_question: function( options ) {
+			var self      = this,
+				$question = this.$container.find( '.llms-question-wrapper' ),
+				type      = $question.attr( 'data-type' ),
+				valid;
+
+			if ( ! this.validators[ type ] ) {
+				console.log( 'No validator registered for question type ' + type );
+				return;
+			}
+
+			valid = this.validators[ type ]( $question );
+
+			var requestData = {
+				action: 'quiz_answer_question',
+				answer: valid.answer,
+				attempt_key: self.attempt_key,
+				question_id: $question.attr( 'data-id' ),
+				question_type: $question.attr( 'data-type' ),
+			};
+
+			if ( options && options.exit_quiz ) {
+				requestData.via_exit_quiz = true;
+			}
+
+			if ( options && options.previous_question ) {
+				requestData.via_previous_question = true;
+			}
+
+			LLMS.Ajax.call( {
+				data: requestData,
+				success: function( r ) {
+					if (options && typeof options.callback === 'function') {
+						options.callback();
+					}
+				},
+			});
+		},
+
 		/**
 		 * Answer a Question
 		 *
@@ -334,32 +394,75 @@
 		},
 
 		/**
-		 * Return to the previous question
+		 * Return to the previous question.
 		 *
-		 * @return   void
-		 * @since    1.0.0
-		 * @version  3.16.6
+		 * @since 1.0.0
+		 * @since 3.16.6 Unknown.
+		 * @since [version] Retrieve question HTML from the server when not cached.
+		 *
+		 * @return {Void}
 		 */
 		previous_question: function() {
 
 			var self = this;
 
-			self.toggle_loader( 'show', LLMS.l10n.translate( 'Loading Question...' ) );
-			self.update_progress_bar( 'decrement' );
+			this.save_question( {
+				previous_question: true,
+				callback: function() {
 
-			var ids     = Object.keys( self.questions ),
-				curr    = ids.indexOf( 'q-' + self.current_question ),
-				prev_id = ids[0];
+					self.toggle_loader( 'show', LLMS.l10n.translate( 'Loading Question...' ) );
+					self.update_progress_bar( 'decrement' );
 
-			if ( curr >= 1 ) {
-				prev_id = ids[ curr - 1 ];
-			}
+					var ids     = Object.keys( self.questions ),
+						curr    = ids.indexOf( 'q-' + self.current_question ),
+						prev_id = ids[0];
 
-			setTimeout( function() {
-				self.toggle_loader( 'hide' );
-				self.load_question( self.questions[ prev_id ] );
-			}, 100 );
+					if ( curr >= 1 ) {
+						prev_id = ids[ curr - 1 ];
+					}
+
+					// Retrieve previous question HTML from the server.
+					if ( ! self.questions[ prev_id ] ) {
+						LLMS.Ajax.call( {
+							data: {
+								action     : 'quiz_get_question',
+								attempt_key: self.attempt_key,
+								question_id: prev_id.substring(2), // Remove 'q-'.
+							},
+							success: function( r ) {
+
+								self.toggle_loader( 'hide' );
+								if ( r.data && r.data.html ) {
+
+									self.load_question( r.data.html );
+
+								} else if ( r.data && r.data.redirect ) {
+
+									self.redirect( r.data.redirect );
+
+								} else if ( r.message ) {
 
+									self.$container.append( '<p>' + r.message + '</p>' );
+
+								} else {
+
+									var msg = LLMS.l10n.translate( 'An unknown error occurred. Please try again.' );
+									self.$container.append( '<p>' + msg + '</p>' );
+
+								}
+
+							}
+
+						} );
+
+					} else {
+						setTimeout( function() {
+							self.toggle_loader( 'hide' );
+							self.load_question( self.questions[ prev_id ] );
+						}, 100 );
+					}
+				}
+			});
 		},
 
 		/**
@@ -378,44 +481,96 @@
 		},
 
 		/**
-		 * Start a Quiz via AJAX call
+		 * Start a Quiz.
 		 *
-		 * @return   void
-		 * @since    1.0.0
-		 * @version  3.24.3
+         * @since 1.0.0
+         * @since 3.24.3 Unknown.
+		 * @since [version] Abstracted the function in `init_quiz`.
+		 *
+		 * @return {Void}
 		 */
 		start_quiz: function () {
 
+			this.init_quiz( 'quiz_start' );
+		},
+
+		/**
+		 * Resume a Quiz.
+		 *
+		 * @since [version]
+		 *
+		 * @return {Void}
+		 */
+		resume_quiz: function () {
+
+			this.init_quiz( 'quiz_resume' );
+		},
+
+		/**
+		 * Initiate 'Start' or 'Resume' action on a Quiz via AJAX call.
+		 *
+		 * @since [version]
+		 *
+		 * @return {Void}
+		 */
+		init_quiz: function ( action ) {
+
 			var self = this;
 
+			if( 'quiz_resume' === action ) {
+				// Disable resume button.
+				$( '#llms_resume_quiz' ).attr( 'disabled', 'disabled' );
+			}
+
 			this.load_ui_elements();
 			this.$ui        = $( '#llms-quiz-ui' );
 			this.$buttons   = $( '#llms-quiz-nav button' );
 			this.$container = $( '#llms-quiz-question-wrapper' );
 
-			// bind submission event for answering questions
+			// Bind submission event for answering questions.
 			$( '#llms-next-question, #llms-complete-quiz' ).on( 'click', function( e ) {
 				e.preventDefault();
 				self.answer_question( $( this ) );
 			} );
 
-			// bind submission event for navigating backwards
+			// Bind submission event for navigating backwards.
 			$( '#llms-prev-question' ).on( 'click', function( e ) {
 				e.preventDefault();
 				self.previous_question();
 			} );
 
-			LLMS.Ajax.call( {
-				data: {
+			// Bind exit event for quiz.
+			$( '#llms-quiz-nav' ).on( 'click', '#llms-exit-quiz', function( e ) {
+				e.preventDefault();
+				self.save_question( {
+					exit_quiz: true,
+					callback: function() {
+						self.exiting_quiz = true;
+						window.location.reload();
+					}
+				});
+			} );
+
+			if ( 'quiz_resume' === action ) {
+				data = {
+					action: 'quiz_resume',
+					attempt_key: $( '#llms-attempt-key' ).val(),
+				};
+			} else {
+				data = {
 					action: 'quiz_start',
 					attempt_key: $( '#llms-attempt-key' ).val(),
 					lesson_id : $( '#llms-lesson-id' ).val(),
 					quiz_id : $( '#llms-quiz-id' ).val(),
-				},
+				};
+			}
+
+			LLMS.Ajax.call( {
+				data: data,
 				beforeSend: function() {
 
 					self.status = true;
-					$( '#llms-quiz-wrapper, #quiz-start-button' ).remove();
+					$( '#llms-quiz-wrapper, #quiz-start-button, #quiz-resume-button' ).remove();
 					$( 'html, body' ).stop().animate( {scrollTop: 0 }, 500 );
 					self.toggle_loader( 'show', LLMS.l10n.translate( 'Loading Quiz...' ) );
 
@@ -429,16 +584,27 @@
 
 					if ( r.data && r.data.html ) {
 
-						// start the quiz timer when a time limit is set
-						if ( r.data.time_limit ) {
+						self.attempt_key     = r.data.attempt_key;
+						self.total_questions = r.data.total;
+						self.resumable       = r.data.can_be_resumed;
+
+						if( 'quiz_resume' === action ) {
+							r.data.question_ids.forEach( id => self.questions[`q-${id}`] = '' );
+						} else if ( r.data.time_limit ) {
 							self.start_quiz_timer( r.data.time_limit );
 						}
 
-						self.attempt_key     = r.data.attempt_key;
-						self.total_questions = r.data.total;
+						// Adding Exit Button in Layout if quiz is resumable.
+						if ( self.resumable ) {
+							$( '#llms-quiz-nav' ).append( '<button class="button llms-button-secondary" id="llms-exit-quiz" name="llms_exit_quiz">' + LLMS.l10n.translate( 'Exit Quiz' ) + '</button>' );
+						}
 
 						self.load_question( r.data.html );
 
+						if ( 'quiz_resume' === action ) {
+							self.update_progress_bar( 'reload' );
+						}
+
 					} else if ( r.message ) {
 
 						self.$container.append( '<p>' + r.message + '</p>' );
@@ -469,7 +635,6 @@
 				} );
 
 			}
-
 		},
 
 		/**
@@ -600,6 +765,11 @@
 		 */
 		load_ui_elements: function() {
 
+			// Removing the quiz UI elements if they already exist.
+			if ( $( '#llms-quiz-ui').length > 0 ) {
+				$( '#llms-quiz-ui' ).remove();
+			}
+
 			var $html   = $( '<div class="llms-quiz-ui" id="llms-quiz-ui" />' ),
 				$header = $( '<header class="llms-quiz-header" id="llms-quiz-header" />' )
 				$footer = $( '<footer class="llms-quiz-nav" id="llms-quiz-nav" />' );
@@ -670,17 +840,17 @@
 		},
 
 		/**
-		 * Update the progress bar and toggle button availability based on question the question being shown
+		 * Update the progress bar and toggle button availability based on question the question being shown.
 		 *
-		 * @param    {[type]}   qid  [description]
-		 * @return   {[type]}
-		 * @since    3.16.0
-		 * @version  3.16.0
+		 * @since 3.16.0
+		 * @since [version] Show counter and set the total as when needed.
+		 *
+		 * @param {Int} qid Question ID.
+		 * @return {Void}
 		 */
 		update_progress: function( qid ) {
 
-			var index = this.get_question_index( qid ),
-				progress;
+			var index = this.get_question_index( qid );
 
 			if ( -1 === index ) {
 				return;
@@ -689,12 +859,12 @@
 			index++;
 
 			$( '#llms-quiz-counter .llms-current' ).text( index );
-			if ( index === 1 ) {
+			if ( index > 0 && ! $( '#llms-quiz-counter .llms-total' ).text() ) {
 				$( '#llms-quiz-counter .llms-total' ).text( this.total_questions );
 				$( '#llms-quiz-counter' ).show();
 			}
 
-			// handle prev question
+			// Handle prev question.
 			if ( index >= 2 ) {
 				$( '#llms-prev-question' ).show();
 			} else {
diff --git a/assets/js/llms-quiz.min.js b/assets/js/llms-quiz.min.js
deleted file mode 100644
index 597c95192d..0000000000
--- a/assets/js/llms-quiz.min.js
+++ /dev/null
@@ -1,2 +0,0 @@
-!function(c){var t={$buttons:null,$container:null,$ui:null,attempt_key:null,current_question:0,total_questions:0,questions:{},validators:{},status:null,bind:function(){var e=this;c("#llms_start_quiz").on("click",function(t){t.preventDefault(),e.start_quiz()}),c(".llms-donut").each(function(){LLMS.Donut(c(this))}),c("#llms-quiz-attempt-select").on("change",function(){var t=c(this).val();t&&(window.location.href=t)}),c(window).on("beforeunload",function(){if(e.status)return LLMS.l10n.translate("Are you sure you wish to quit this quiz attempt?")}),c(window).on("unload",function(){e.status&&e.complete_quiz()}),c(document).on("llms-post-append-question",e.post_append_question),this.register_validator("content",this.validate),this.register_validator("choice",this.validate_choice),this.register_validator("picture_choice",this.validate_choice),this.register_validator("true_false",this.validate_choice)},add_error:function(t){this.$container.find(".llms-error").remove();var e=c('<p class="llms-error">'+t+'<a href="#"><i class="fa fa-times-circle" aria-hidden="true"></i></a></p>');e.on("click","a",function(t){t.preventDefault(),e.fadeOut("200"),setTimeout(function(){e.remove()},210)}),this.$container.append(e)},answer_question:function(e){var t,n=this,s=this.$container.find(".llms-question-wrapper"),i=s.attr("data-type");if(this.validators[i]){if(!(t=this.validators[i](s))||!0!==t.valid||!t.answer)return n.add_error(t.valid);LLMS.Ajax.call({data:{action:"quiz_answer_question",answer:t.answer,attempt_key:n.attempt_key,question_id:s.attr("data-id"),question_type:s.attr("data-type")},beforeSend:function(){var t=e.hasClass("llms-button-quiz-complete")?LLMS.l10n.translate("Grading Quiz..."):LLMS.l10n.translate("Loading Question...");n.toggle_loader("show",t),n.update_progress_bar("increment")},success:function(t){n.toggle_loader("hide"),t.data&&t.data.html?t.data.question_id&&n.questions["q-"+t.data.question_id]?n.load_question(n.questions["q-"+t.data.question_id]):n.load_question(t.data.html):t.data&&t.data.redirect?n.redirect(t.data.redirect):t.message?n.$container.append("<p>"+t.message+"</p>"):(t=LLMS.l10n.translate("An unknown error occurred. Please try again."),n.$container.append("<p>"+t+"</p>"))},error:function(t,e,s){n.reload_question(),n.add_error(LLMS.l10n.translate("An unknown error occurred. Please try again.")),console.log(s)}})}else console.log("No validator registered for question type "+i)},complete_quiz:function(){var e=this;LLMS.Ajax.call({data:{action:"quiz_end",attempt_key:e.attempt_key},beforeSend:function(){e.toggle_loader("show","Grading Quiz...")},success:function(t){e.toggle_loader("hide"),t.data&&t.data.redirect?e.redirect(t.data.redirect):t.message?e.$container.append("<p>"+t.message+"</p>"):(t=LLMS.l10n.translate("An unknown error occurred. Please try again."),e.$container.append("<p>"+t+"</p>"))}})},get_question_index:function(t){return Object.keys(this.questions).indexOf("q-"+t)},redirect:function(t){this.toggle_loader("show","Grading Quiz..."),this.status=null,window.location.href=t},reload_question:function(){var t=this;t.toggle_loader("show",LLMS.l10n.translate("Loading Question...")),t.update_progress_bar("reload"),setTimeout(function(){t.toggle_loader("hide"),t.load_question(t.questions["q-"+t.current_question])},100)},previous_question:function(){var t=this,e=(t.toggle_loader("show",LLMS.l10n.translate("Loading Question...")),t.update_progress_bar("decrement"),Object.keys(t.questions)),s=e.indexOf("q-"+t.current_question),n=e[0];1<=s&&(n=e[s-1]),setTimeout(function(){t.toggle_loader("hide"),t.load_question(t.questions[n])},100)},register_validator:function(t,e){this.validators[t]=e},start_quiz:function(){var e=this;this.load_ui_elements(),this.$ui=c("#llms-quiz-ui"),this.$buttons=c("#llms-quiz-nav button"),this.$container=c("#llms-quiz-question-wrapper"),c("#llms-next-question, #llms-complete-quiz").on("click",function(t){t.preventDefault(),e.answer_question(c(this))}),c("#llms-prev-question").on("click",function(t){t.preventDefault(),e.previous_question()}),LLMS.Ajax.call({data:{action:"quiz_start",attempt_key:c("#llms-attempt-key").val(),lesson_id:c("#llms-lesson-id").val(),quiz_id:c("#llms-quiz-id").val()},beforeSend:function(){e.status=!0,c("#llms-quiz-wrapper, #quiz-start-button").remove(),c("html, body").stop().animate({scrollTop:0},500),e.toggle_loader("show",LLMS.l10n.translate("Loading Quiz..."))},error:function(t,e,s){console.log(t,e,s)},success:function(t){e.toggle_loader("hide"),t.data&&t.data.html?(t.data.time_limit&&e.start_quiz_timer(t.data.time_limit),e.attempt_key=t.data.attempt_key,e.total_questions=t.data.total,e.load_question(t.data.html)):t.message?e.$container.append("<p>"+t.message+"</p>"):(t=LLMS.l10n.translate("An unknown error occurred. Please try again."),e.$container.append("<p>"+t+"</p>"))}}),LLMS.is_touch_device()||(this.$ui.on("mouseenter","li.llms-choice label",function(){c(this).addClass("hovered")}),this.$ui.on("mouseleave","li.llms-choice label",function(){c(this).removeClass("hovered")}))},start_quiz_timer:function(t){var e,s,n,i,a=c('<div class="llms-quiz-timer" id="llms-quiz-timer" />'),o=LLMS.l10n.translate("Time Remaining"),l=(a.append('<i class="fa fa-clock-o" aria-hidden="true"></i><span class="screen-reader-text">'+o+"</span>"),a.append('<div id="llms-tiles" class="llms-tiles"></div>'),c("#llms-quiz-header").append(a),this),r=(new Date).getTime()+60*t*1e3,u=60*t*1e3,d=document.getElementById("llms-tiles");setTimeout(function(){l.complete_quiz()},1e3+u),this.getCountdown(t,r,u,e,s,n,i,d),setInterval(function(){l.getCountdown(t,r,u,e,s,n,i,d)},1e3)},trigger:function(t){"answer_question"===t&&(this.get_question_index(this.current_question)===this.total_questions?c("#llms-complete-quiz"):c("#llms-next-question")).trigger("click")},load_question:function(t){var t=c(t),e=t.attr("data-id");this.questions["q-"+e]||(this.questions["q-"+e]=t),this.update_progress(e),this.current_question=e,c(document).trigger("llms-pre-append-question",t),this.$container.append(t),c(document).trigger("llms-post-append-question",t)},load_ui_elements:function(){var t=c('<div class="llms-quiz-ui" id="llms-quiz-ui" />'),e=c('<header class="llms-quiz-header" id="llms-quiz-header" />');($footer=c('<footer class="llms-quiz-nav" id="llms-quiz-nav" />')).append('<button class="button large llms-button-action" id="llms-next-question" name="llms_next_question" type="submit">'+LLMS.l10n.translate("Next Question")+"</button>"),$footer.append('<button class="button large llms-button-action llms-button-quiz-complete" id="llms-complete-quiz" name="llms_complete_quiz" type="submit" style="display:none;">'+LLMS.l10n.translate("Complete Quiz")+"</button>"),$footer.append('<button class="button llms-button-secondary" id="llms-prev-question" name="llms_prev_question" type="submit" style="display:none;">'+LLMS.l10n.translate("Previous Question")+"</button>"),e.append('<div class="llms-progress"><div class="progress-bar-complete"></div></div>'),$footer.append('<div class="llms-quiz-counter" id="llms-quiz-counter"><span class="llms-current"></span><span class="llms-sep">/</span><span class="llms-total"></span></div>'),t.append(e).append('<div class="llms-quiz-question-wrapper" id="llms-quiz-question-wrapper" />').append($footer),c("#llms-quiz-wrapper").after(t)},post_append_question:function(t,e){c(e).find("audio").length&&wp.mediaelement.initialize()},toggle_loader:function(t,e){"show"===t?(e=e||LLMS.l10n.translate("Loading..."),this.$buttons.attr("disabled","disabled"),this.$container.empty(),LLMS.Spinner.start(this.$container),this.$container.append('<div class="llms-quiz-loading">'+LLMS.l10n.translate(e)+"</div>")):(LLMS.Spinner.stop(this.$container),this.$buttons.removeAttr("disabled"),this.$container.find(".llms-quiz-loading").remove())},update_progress:function(t){t=this.get_question_index(t);-1!==t&&(t++,c("#llms-quiz-counter .llms-current").text(t),1==t&&(c("#llms-quiz-counter .llms-total").text(this.total_questions),c("#llms-quiz-counter").show()),2<=t?c("#llms-prev-question").show():c("#llms-prev-question").hide(),t===this.total_questions?(c("#llms-next-question").hide(),c("#llms-complete-quiz").show()):(c("#llms-next-question").show(),c("#llms-complete-quiz").hide()))},update_progress_bar:function(t){var e=this.get_question_index(this.current_question);switch(t){case"increment":e++;break;case"decrement":e--}progress=e/this.total_questions*100,this.$ui.find(".progress-bar-complete").css("width",progress+"%")},getCountdown:function(t,e,s,n,i,a,o,l){e=(e-(new Date).getTime())/1e3;0<=e&&(1e3*e<s/2&&c("#llms-quiz-timer").addClass("color-half"),1e3*e<s/4&&(c("#llms-quiz-timer").removeClass("color-half"),c("#llms-quiz-timer").addClass("color-empty")),this.pad(parseInt(e/86400)),e%=86400,i=this.pad(parseInt(e/3600)),e%=3600,a=this.pad(parseInt(e/60)),o=this.pad(parseInt(e%60)),l.innerHTML='<span class="hours">'+i+'</span>:<span class="minutes">'+a+'</span>:<span class="seconds">'+o+"</span>")},pad:function(t){return(t<10?"0":"")+t},validate:function(t){return{answer:[],valid:!0}},validate_choice:function(t){var e=window.llms.quizzes.validate(t),t=t.find("input:checked");return t.length?t.each(function(){e.answer.push(c(this).val())}):e.valid=LLMS.l10n.translate("You must select an answer to continue."),e}};t.bind(),window.llms=window.llms||{},window.llms.quizzes=t}(jQuery);
-//# sourceMappingURL=../maps/js/llms-quiz.min.js.map
diff --git a/assets/scss/admin/_llms-table.scss b/assets/scss/admin/_llms-table.scss
index 6f286150d6..9d02556df3 100644
--- a/assets/scss/admin/_llms-table.scss
+++ b/assets/scss/admin/_llms-table.scss
@@ -118,6 +118,10 @@
 			}
 		}
 
+		.llms-clear-resumable-attempts {
+			float: left;
+		}
+
 		.llms-table-pagination {
 			float: right;
 		}
diff --git a/includes/abstracts/abstract.llms.admin.table.php b/includes/abstracts/abstract.llms.admin.table.php
index 4d289bdf53..c734c143fe 100644
--- a/includes/abstracts/abstract.llms.admin.table.php
+++ b/includes/abstracts/abstract.llms.admin.table.php
@@ -5,7 +5,7 @@
  * @package LifterLMS/Abstracts/Classes
  *
  * @since 3.2.0
- * @version 7.3.0
+ * @version [version]
  */
 
 defined( 'ABSPATH' ) || exit;
@@ -576,6 +576,7 @@ public function output_table_filters_html() {
 	 * @since 3.2.0
 	 * @since 3.17.8 Unknown.
 	 * @since 3.37.7 Use correct argument order for implode to fix php 7.4 deprecation.
+	 * @since [version] Added button for clearing resumable attempts.
 	 *
 	 * @return string
 	 * @deprecated 7.7.0 Use output_table_html() instead.
@@ -787,6 +788,19 @@ public function output_tfoot_html() {
 		<tfoot>
 		<tr>
 			<th colspan="<?php echo esc_attr( $this->get_columns_count() ); ?>">
+				<?php if ( $this->has_resumable_attempts() ) : ?>
+					<div class="llms-clear-resumable-attempts">
+						<form action="" method="POST">
+							<button class="llms-button-primary small" name="llms_quiz_resumable_attempt_action" type="submit" value="llms_clear_resumable_attempts">
+								<i class="fa fa-trash-o" aria-hidden="true"></i>
+								<?php _e( 'Clear resumable attempts', 'lifterlms' ); ?>
+							</button>
+							<input type="hidden" name="llms_quiz_id" value="<?php echo esc_attr( $this->quiz_id ); ?>">
+							<?php wp_nonce_field( 'llms_quiz_attempt_actions', '_llms_quiz_attempt_nonce' ); ?>
+						</form>
+					</div>
+				<?php endif; ?>
+
 				<?php if ( $this->is_exportable ) : ?>
 					<div class="llms-table-export">
 						<button class="llms-button-primary small" name="llms-table-export">
@@ -822,6 +836,22 @@ public function output_tfoot_html() {
 		<?php
 	}
 
+	/**
+	 * Check if any quiz has resumable attempts.
+	 *
+	 * @since [version]
+	 *
+	 * @return bool
+	 */
+	public function has_resumable_attempts() {
+		if ( 'quizzes' === llms_filter_input( INPUT_GET, 'tab' ) && 'attempts' === llms_filter_input( INPUT_GET, 'stab' ) ) {
+			$admin_quiz_attempts = new LLMS_Controller_Admin_Quiz_Attempts();
+			$quizzes             = $admin_quiz_attempts->get_resumable_attempts( $this->quiz_id );
+			return ! empty( $quizzes );
+		}
+		return false;
+	}
+
 	/**
 	 * Get a thead element for the table.
 	 *
diff --git a/includes/abstracts/llms.abstract.notification.view.quiz.completion.php b/includes/abstracts/llms.abstract.notification.view.quiz.completion.php
index 7077c755c2..0348cce8cc 100644
--- a/includes/abstracts/llms.abstract.notification.view.quiz.completion.php
+++ b/includes/abstracts/llms.abstract.notification.view.quiz.completion.php
@@ -5,7 +5,7 @@
  * @package LifterLMS/Abstracts/Classes
  *
  * @since 3.24.0
- * @version 5.2.0
+ * @version [version]
  */
 
 defined( 'ABSPATH' ) || exit;
@@ -101,10 +101,11 @@ protected function set_merge_codes() {
 	}
 
 	/**
-	 * Replace merge codes with actual values
+	 * Replace merge codes with actual values.
 	 *
 	 * @since 3.24.0
 	 * @since 4.0.0 Remove usage of deprecated class `LLMS_Quiz_Legacy`.
+	 * @since [version] Don't try to round nulls.
 	 *
 	 * @param string $code The merge code to get merged data for.
 	 * @return string
@@ -133,7 +134,7 @@ protected function set_merge_data( $code ) {
 				break;
 
 			case '{{GRADE}}':
-				$code = round( $attempt->get( 'grade' ), 2 ) . '%';
+				$code = round( $attempt->get( 'grade' ) ?? 0, 2 ) . '%';
 				break;
 
 			case '{{GRADE_BAR}}':
diff --git a/includes/admin/reporting/tables/llms.table.quiz.attempts.php b/includes/admin/reporting/tables/llms.table.quiz.attempts.php
index 8a63df14b6..a67c024611 100644
--- a/includes/admin/reporting/tables/llms.table.quiz.attempts.php
+++ b/includes/admin/reporting/tables/llms.table.quiz.attempts.php
@@ -5,7 +5,7 @@
  * @package LifterLMS/Admin/Reporting/Tables/Classes
  *
  * @since 3.16.0
- * @version 6.0.0
+ * @version [version]
  */
 
 defined( 'ABSPATH' ) || exit;
@@ -92,13 +92,15 @@ class LLMS_Table_Quiz_Attempts extends LLMS_Admin_Table {
 	protected $quiz_id = null;
 
 	/**
-	 * Retrieve data for a cell
+	 * Retrieve data for a cell.
 	 *
-	 * @param    string $key      the column id / key
-	 * @param    obj    $attempt  LLMS_Quiz_Attempt obj
-	 * @return   mixed
-	 * @since    3.16.0
-	 * @version  3.26.3
+	 * @since 3.16.0
+	 * @since 3.26.3 Unknown.
+	 * @since [version] Added information about whether the attempt can be resumed.
+	 *
+	 * @param string            $key     The column id / key.
+	 * @param LLMS_Quiz_Attempt $attempt LLMS_Quiz_Attempt obj.
+	 * @return mixed
 	 */
 	protected function get_data( $key, $attempt ) {
 
@@ -117,8 +119,12 @@ protected function get_data( $key, $attempt ) {
 				break;
 
 			case 'grade':
-				$value  = $attempt->get( $key ) ? $attempt->get( $key ) . '%' : '0%';
-				$value .= ' (' . $attempt->l10n( 'status' ) . ')';
+				$value      = $attempt->get( $key ) ? $attempt->get( $key ) . '%' : '0%';
+				$additional = $attempt->l10n( 'status' );
+				if ( $attempt->can_be_resumed() && $attempt->is_last_attempt() ) {
+					$additional .= ' - ' . esc_html__( 'Can be resumed', 'lifterlms' );
+				}
+				$value .= ' (' . $additional . ')';
 				break;
 
 			case 'start_date':
diff --git a/includes/class.llms.ajax.handler.php b/includes/class.llms.ajax.handler.php
index 864670a530..10efeba29d 100644
--- a/includes/class.llms.ajax.handler.php
+++ b/includes/class.llms.ajax.handler.php
@@ -5,7 +5,7 @@
  * @package LifterLMS/Classes
  *
  * @since 1.0.0
- * @version 7.1.0
+ * @version [version]
  */
 
 defined( 'ABSPATH' ) || exit;
@@ -58,7 +58,6 @@ public static function bulk_enroll_membership_into_course( $request ) {
 		return array(
 			'message' => __( 'Members are being enrolled in the background. You may leave this page.', 'lifterlms' ),
 		);
-
 	}
 
 	/**
@@ -81,7 +80,6 @@ public static function bulk_enroll_students( $request ) {
 		foreach ( $request['student_ids'] as $id ) {
 			llms_enroll_student( intval( $id ), $post_id, 'admin_' . get_current_user_id() );
 		}
-
 	}
 
 	/**
@@ -105,7 +103,7 @@ public static function check_voucher_duplicate() {
 		$codes = implode(
 			',',
 			array_map(
-				function( $code ) {
+				function ( $code ) {
 					return sprintf( "'%s'", esc_sql( $code ) );
 				},
 				array_filter( $codes )
@@ -129,7 +127,6 @@ function( $code ) {
 			)
 		);
 		wp_die();
-
 	}
 
 	/**
@@ -156,7 +153,6 @@ public static function delete_access_plan( $request ) {
 		}
 
 		return true;
-
 	}
 
 	/**
@@ -178,7 +174,6 @@ protected static function get_admin_table_instance( $handler ) {
 		}
 
 		return false;
-
 	}
 
 	/**
@@ -204,7 +199,6 @@ public static function export_admin_table( $request ) {
 
 		$file = isset( $request['filename'] ) ? $request['filename'] : null;
 		return $table->generate_export_file( $request, $file );
-
 	}
 
 	/**
@@ -235,7 +229,6 @@ public static function get_admin_table_data( $request ) {
 			'tbody' => trim( $table->get_tbody_html() ),
 			'tfoot' => trim( $table->get_tfoot_html() ),
 		);
-
 	}
 
 	/**
@@ -313,7 +306,6 @@ public static function instructors_mb_store( $request ) {
 				'success' => true,
 			)
 		);
-
 	}
 
 	/**
@@ -355,7 +347,6 @@ public static function notifications_heartbeart( $request ) {
 		$ret['new'] = $query->get_notifications();
 
 		return $ret;
-
 	}
 
 	/**
@@ -379,7 +370,6 @@ public static function membership_remove_auto_enroll_course( $request ) {
 		if ( ! $membership->remove_auto_enroll_course( intval( $request['course_id'] ) ) ) {
 			return new WP_Error( 'error', __( 'There was an error removing the course, please try again.', 'lifterlms' ) );
 		}
-
 	}
 
 	/**
@@ -599,7 +589,6 @@ public static function query_students() {
 		);
 
 		wp_die();
-
 	}
 
 	/**
@@ -608,6 +597,7 @@ public static function query_students() {
 	 * @since 3.9.0
 	 * @since 3.16.4 Unknown.
 	 * @since 6.4.0 Make sure attempts limit was not reached.
+	 * @since [version] Use `$attempt->get( 'status' )` instead of the not existing `$attempt->get_status()` method and added `can_be_resumed` param.
 	 *
 	 * @param array $request $_POST data.
 	 *                       required:
@@ -615,7 +605,6 @@ public static function query_students() {
 	 *                           or
 	 *                           (int) quiz_id
 	 *                           (int) lesson_id.
-	 *
 	 * @return WP_Error|array WP_Error on error or array containing html template of the first question.
 	 */
 	public static function quiz_start( $request ) {
@@ -639,13 +628,22 @@ public static function quiz_start( $request ) {
 			$attempt = $student->quizzes()->get_attempt_by_key( $request['attempt_key'] );
 		}
 
-		if ( ! $attempt || 'new' !== $attempt->get_status() ) {
+		if ( ! $attempt || 'new' !== $attempt->get( 'status' ) ) {
 
 			if ( ! isset( $request['quiz_id'] ) || ! isset( $request['lesson_id'] ) ) {
 				$err->add( 400, __( 'There was an error starting the quiz. Please return to the lesson and begin again.', 'lifterlms' ) );
 				return $err;
 			}
 
+			// Mark the previous attempt as ended if it could be resumed but we're restarting instead.
+			$previous_attempt_key = ( new LLMS_Quiz( $request['quiz_id'] ) )->get_student_last_attempt_key();
+			if ( $previous_attempt_key ) {
+				$previous_attempt = $student->quizzes()->get_attempt_by_key( $previous_attempt_key );
+				if ( $previous_attempt && $previous_attempt->can_be_resumed() ) {
+					$previous_attempt->end();
+				}
+			}
+
 			$attempt = LLMS_Quiz_Attempt::init( absint( $request['quiz_id'] ), absint( $request['lesson_id'] ), $student->get( 'id' ) );
 
 		}
@@ -669,13 +667,155 @@ public static function quiz_start( $request ) {
 		$limit = $quiz->has_time_limit() ? $quiz->get( 'time_limit' ) : false;
 
 		return array(
-			'attempt_key' => $attempt->get_key(),
+			'attempt_key'    => $attempt->get_key(),
+			'html'           => $html,
+			'time_limit'     => $limit,
+			'question_id'    => $question_id,
+			'total'          => $attempt->get_count( 'questions' ),
+			'can_be_resumed' => $attempt->can_be_resumed(),
+		);
+	}
+
+	/**
+	 * Resume a Quiz Attempt.
+	 *
+	 * @since [version]
+	 *
+	 * @param array $request $_POST data.
+	 *                       required:
+	 *                           (string) attempt_key
+	 * @return WP_Error|array WP_Error on error or array containing html template of the first question to be answered.
+	 */
+	public static function quiz_resume( $request ) {
+
+		$err = new WP_Error();
+
+		$student = llms_get_student();
+		if ( ! $student ) {
+			$err->add( 400, __( 'You must be logged in to take quizzes.', 'lifterlms' ) );
+			return $err;
+		}
+
+		if ( ! isset( $request['attempt_key'] ) ) {
+			$err->add( 400, __( 'Attempt key is required.', 'lifterlms' ) );
+			return $err;
+		}
+
+		$attempt = $student->quizzes()->get_attempt_by_key( $request['attempt_key'] );
+
+		if ( empty( $attempt ) ) {
+			$err->add( 404, __( 'The requested attempt could not be found.', 'lifterlms' ) );
+			return $err;
+		}
+
+		$quiz = $attempt->get_quiz();
+		if ( empty( $quiz ) ) {
+			$err->add( 400, __( 'No quiz found.', 'lifterlms' ) );
+			return $err;
+		}
+
+		if (
+			! $attempt->can_be_resumed() ||
+			! $attempt->is_last_attempt()
+		) {
+			$err->add(
+				400,
+				__(
+					'There was an error resuming the quiz. Please return to the lesson and begin again.',
+					'lifterlms'
+				)
+			);
+			return $err;
+		}
+
+		$question_ids = array_column( $attempt->get_questions(), 'id' );
+		if ( ! $question_ids ) {
+			$err->add(
+				404,
+				__( 'Unable to resume quiz because the quiz does not contain any questions.', 'lifterlms' )
+			);
+			return $err;
+		}
+
+		$question_id = $attempt->get( 'current_question_id' ) ? $attempt->get( 'current_question_id' ) : $attempt->get_next_question( null );
+
+		if ( ! $question_id ) {
+			return self::quiz_end( $request, $attempt );
+		}
+
+		$html = llms_get_template_ajax(
+			'content-single-question.php',
+			array(
+				'attempt'  => $attempt,
+				'question' => llms_get_post( $question_id ),
+			)
+		);
+
+		return array(
+			'attempt_key'    => $attempt->get_key(),
+			'html'           => $html,
+			'question_id'    => $question_id,
+			'total'          => $attempt->get_count( 'questions' ),
+			'question_ids'   => $question_ids,
+			'can_be_resumed' => $attempt->can_be_resumed(),
+		);
+	}
+
+	/**
+	 * AJAX Quiz get question.
+	 *
+	 * @since [version]
+	 *
+	 * @param array $request $_POST data.
+	 * @return WP_Error|array
+	 */
+	public static function quiz_get_question( $request ) {
+		$err = new WP_Error();
+
+		$student = llms_get_student();
+		if ( ! $student ) {
+			$err->add( 400, __( 'You must be logged in to take quizzes.', 'lifterlms' ) );
+			return $err;
+		}
+
+		$required = array( 'attempt_key', 'question_id' );
+		foreach ( $required as $key ) {
+			if ( empty( $request[ $key ] ) ) {
+				$err->add( 400, __( 'Missing required parameters. Could not proceed.', 'lifterlms' ) );
+				return $err;
+			}
+		}
+
+		$attempt_key     = sanitize_text_field( $request['attempt_key'] );
+		$question_id     = absint( $request['question_id'] );
+		$student_quizzes = $student->quizzes();
+		$attempt         = $student_quizzes->get_attempt_by_key( $attempt_key );
+
+		// Don't allow the question to be retrieved if the attempt is not open or can't be resumed.
+		if ( ! $attempt || ! $attempt->get_quiz()->is_open() || ( $attempt->get_quiz()->can_be_resumed() && ! $attempt->can_be_resumed() ) ) {
+			$err->add( 500, __( 'There was an error retrieving the question. Please return to the lesson and try again.', 'lifterlms' ) );
+			return $err;
+		}
+
+		$question_id = $attempt->get_question( $question_id );
+
+		if ( ! $question_id ) {
+			$err->add( 404, __( 'Cannot find the requested question id. Please return to the lesson and try again.', 'lifterlms' ) );
+			return $err;
+		}
+
+		$html = llms_get_template_ajax(
+			'content-single-question.php',
+			array(
+				'attempt'  => $attempt,
+				'question' => llms_get_post( $question_id ),
+			)
+		);
+
+		return array(
 			'html'        => $html,
-			'time_limit'  => $limit,
 			'question_id' => $question_id,
-			'total'       => $attempt->get_count( 'questions' ),
 		);
-
 	}
 
 	/**
@@ -712,7 +852,7 @@ public static function quiz_answer_question( $request ) {
 
 		$student_quizzes = $student->quizzes();
 		$attempt         = $student_quizzes->get_attempt_by_key( $attempt_key );
-		if ( ! $attempt ) {
+		if ( ! $attempt || 'incomplete' !== $attempt->get( 'status' ) || ( $attempt->get_quiz()->can_be_resumed() && ! $attempt->can_be_resumed() ) ) {
 			$err->add( 500, __( 'There was an error recording your answer. Please return to the lesson and begin again.', 'lifterlms' ) );
 			return $err;
 		}
@@ -736,11 +876,27 @@ public static function quiz_answer_question( $request ) {
 		// record the answer.
 		$attempt->answer_question( $question_id, $answer );
 
+		if ( isset( $request['via_previous_question'] ) ) {
+			$attempt->set( 'current_question_id', $attempt->get_previous_question( $question_id ) );
+			$attempt->save();
+
+			return;
+		}
+
+		if ( isset( $request['via_exit_quiz'] ) ) {
+			$attempt->set( 'current_question_id', $question_id );
+			$attempt->save();
+
+			return;
+		}
+
 		// get the next question.
 		$question_id = $attempt->get_next_question( $question_id );
 
 		// return html for the next question.
 		if ( $question_id ) {
+			$attempt->set( 'current_question_id', absint( $question_id ) );
+			$attempt->save();
 
 			$html = llms_get_template_ajax(
 				'content-single-question.php',
@@ -760,7 +916,6 @@ public static function quiz_answer_question( $request ) {
 			return self::quiz_end( $request, $attempt );
 
 		}
-
 	}
 
 	/**
@@ -816,7 +971,6 @@ public static function quiz_end( $request, $attempt = null ) {
 			 */
 			'redirect' => apply_filters( 'llms_quiz_complete_redirect', $url, $attempt ),
 		);
-
 	}
 
 	/**
@@ -865,7 +1019,6 @@ public static function remove_coupon_code( $request ) {
 			'gateways_html' => $gateways_html,
 			'summary_html'  => $summary_html,
 		);
-
 	}
 
 	/**
@@ -993,7 +1146,6 @@ public static function select2_query_posts() {
 			)
 		);
 		wp_die();
-
 	}
 
 	/**
@@ -1042,7 +1194,6 @@ public static function update_student_enrollment( $request ) {
 		return array(
 			'success' => true,
 		);
-
 	}
 
 	/**
@@ -1144,7 +1295,6 @@ public static function validate_coupon_code( $request ) {
 		}
 
 		return $error;
-
 	}
 
 	/**
@@ -1164,7 +1314,6 @@ public static function create_section( $request ) {
 		$html = LLMS_Meta_Box_Course_Outline::section_tile( $section_id );
 
 		return $html;
-
 	}
 
 	/**
@@ -1210,7 +1359,6 @@ public static function update_course_section( $request ) {
 
 		$section = new LLMS_Section( $request['section_id'] );
 		return $section->set_title( $request['title'] );
-
 	}
 
 	/**
@@ -1235,7 +1383,6 @@ public static function create_lesson( $request ) {
 		$html = LLMS_Meta_Box_Course_Outline::lesson_tile( $lesson_id, $request['section_id'] );
 
 		return $html;
-
 	}
 
 	/**
@@ -1249,7 +1396,6 @@ public static function create_lesson( $request ) {
 	public static function get_lesson_options_for_select( $request ) {
 
 		return LLMS_Post_Handler::get_lesson_options_for_select_list();
-
 	}
 
 	/**
@@ -1269,7 +1415,6 @@ public static function add_lesson_to_course( $request ) {
 		$html = LLMS_Meta_Box_Course_Outline::lesson_tile( $lesson_id, $request['section_id'] );
 
 		return $html;
-
 	}
 
 	/**
@@ -1289,7 +1434,6 @@ public static function get_course_lesson( $request ) {
 			'title'   => $l->get( 'title' ),
 			'excerpt' => $l->get( 'excerpt' ),
 		);
-
 	}
 
 	/**
@@ -1310,7 +1454,6 @@ public static function update_course_lesson( $request ) {
 		$lesson = new LLMS_Lesson( $request['lesson_id'] );
 
 		return $lesson->update( $post_data );
-
 	}
 
 	/**
@@ -1332,7 +1475,6 @@ public static function remove_course_lesson( $request ) {
 		$lesson = new LLMS_Lesson( $request['lesson_id'] );
 
 		return $lesson->update( $post_data );
-
 	}
 
 	/**
@@ -1373,7 +1515,6 @@ public static function update_section_order( $request ) {
 		}
 
 		return $updated_data;
-
 	}
 
 	/**
@@ -1401,7 +1542,6 @@ public static function update_lesson_order( $request ) {
 		}
 
 		return $updated_data;
-
 	}
 
 	/**
@@ -1443,7 +1583,6 @@ public static function llms_save_membership_autoenroll_courses( $request ) {
 		$membership->add_auto_enroll_courses( $courses, true );
 
 		return true;
-
 	}
 
 	/**
@@ -1498,7 +1637,6 @@ public static function llms_update_access_plans( $request ) {
 			'errors' => $errors,
 			'html'   => $metabox->get_html(),
 		);
-
 	}
 
 	/**
@@ -1524,9 +1662,7 @@ public static function persist_tracking_events( $request ) {
 		}
 
 		return $success;
-
 	}
-
 }
 
 new LLMS_AJAX_Handler();
diff --git a/includes/class.llms.install.php b/includes/class.llms.install.php
index 1419083464..ae0cb03e53 100644
--- a/includes/class.llms.install.php
+++ b/includes/class.llms.install.php
@@ -5,7 +5,7 @@
  * @package LifterLMS/Classes
  *
  * @since 1.0.0
- * @version 6.0.0
+ * @version [version]
  */
 
 defined( 'ABSPATH' ) || exit;
@@ -391,7 +391,7 @@ public static function get_difficulties() {
 	}
 
 	/**
-	 * Get a string of table data that can be passed to dbDelta() to install LLMS tables
+	 * Get a string of table data that can be passed to dbDelta() to install LLMS tables.
 	 *
 	 * @since 3.0.0
 	 * @since 3.16.9 Unknown
@@ -400,6 +400,7 @@ public static function get_difficulties() {
 	 * @since 3.36.0 Added `wp_lifterlms_events` table.
 	 * @since 4.0.0 Added `wp_lifterlms_sessions` table.
 	 * @since 4.5.0 Added `wp_lifterlms_events_open_sessions` table.
+	 * @since [version] Added column `can_be_resumed` and `current_question_id` to the quiz attempt table.
 	 *
 	 * @return string
 	 */
@@ -442,6 +443,8 @@ private static function get_schema() {
   `status` varchar(15) DEFAULT '',
   `attempt` bigint(20) DEFAULT NULL,
   `grade` float DEFAULT NULL,
+  `can_be_resumed` tinyint(1) DEFAULT '0',
+  `current_question_id` bigint(20) DEFAULT NULL,
   `questions` longtext,
   PRIMARY KEY (`id`),
   KEY `student_id` (`student_id`),
diff --git a/includes/class.llms.query.quiz.attempt.php b/includes/class.llms.query.quiz.attempt.php
index bd590dbb9b..a886f3279a 100644
--- a/includes/class.llms.query.quiz.attempt.php
+++ b/includes/class.llms.query.quiz.attempt.php
@@ -1,11 +1,11 @@
 <?php
 /**
- * Query LifterLMS Students for a given course / membership
+ * Query LifterLMS Students for a given course / membership.
  *
  * @package LifterLMS/Classes
  *
  * @since 3.16.0
- * @version 6.0.0
+ * @version [version]
  */
 
 defined( 'ABSPATH' ) || exit;
@@ -41,10 +41,11 @@ class LLMS_Query_Quiz_Attempt extends LLMS_Database_Query {
 	protected $id = 'quiz_attempt';
 
 	/**
-	 * Retrieve default arguments for a student query
+	 * Retrieve default arguments for a student query.
 	 *
 	 * @since 3.16.0
 	 * @since 4.2.0 Added `exclude` default arg.
+	 * @since [version] Added `can_be_resumed` default arg.
 	 *
 	 * @return array
 	 */
@@ -62,6 +63,7 @@ protected function get_default_args() {
 			'status_exclude' => array(),
 			'attempt'        => null,
 			'exclude'        => array(),
+			'can_be_resumed' => null,
 		);
 
 		$args = wp_parse_args( $args, parent::get_default_args() );
@@ -153,11 +155,12 @@ protected function prepare_query() {
 	}
 
 	/**
-	 * SQL "where" clause for the query
+	 * SQL "where" clause for the query.
 	 *
 	 * @since 3.16.0
 	 * @since 3.35.0 Better SQL preparation.
 	 * @since 4.2.0 Added `exclude` arg logic.
+	 * @since [version] Added `can_be_resumed` arg logic.
 	 *
 	 * @return string
 	 */
@@ -200,6 +203,11 @@ protected function sql_where() {
 			$sql     .= " AND status NOT IN ({$prepared})";
 		}
 
+		$can_be_resumed = $this->get( 'can_be_resumed' );
+		if ( '' !== $can_be_resumed ) {
+			$sql .= $wpdb->prepare( ' AND can_be_resumed = %d', $can_be_resumed );
+		}
+
 		return apply_filters( $this->get_filter( 'where' ), $sql, $this );
 
 	}
diff --git a/includes/class.llms.quiz.data.php b/includes/class.llms.quiz.data.php
index 49ae0864ea..1efdc978cd 100644
--- a/includes/class.llms.quiz.data.php
+++ b/includes/class.llms.quiz.data.php
@@ -5,13 +5,13 @@
  * @package LifterLMS/Classes
  *
  * @since 3.16.0
- * @version 4.0.0
+ * @version [version]
  */
 
 defined( 'ABSPATH' ) || exit;
 
 /**
- * Query data about a quiz
+ * Query data about a quiz.
  *
  * @since 3.16.0
  * @since 3.30.3 Explicitly define class properties.
@@ -133,24 +133,24 @@ public function get_count_by_status( $status, $period = 'current' ) {
 	}
 
 	/**
-	 * Retrieve # of quiz fails within the period
+	 * Retrieve # of quiz fails within the period.
 	 *
-	 * @since    3.16.0
+	 * @since 3.16.0
 	 *
-	 * @param    string $period  date period [current|previous]
-	 * @return   int
+	 * @param string $period Date period [current|previous].
+	 * @return int
 	 */
 	public function get_fail_count( $period = 'current' ) {
 		return $this->get_count_by_status( 'fail', $period );
 	}
 
 	/**
-	 * Retrieve # of quiz passes within the period
+	 * Retrieve # of quiz passes within the period.
 	 *
-	 * @since    3.16.0
+	 * @since 3.16.0
 	 *
-	 * @param    string $period  date period [current|previous]
-	 * @return   int
+	 * @param string $period Date period [current|previous].
+	 * @return int
 	 */
 	public function get_pass_count( $period = 'current' ) {
 		return $this->get_count_by_status( 'pass', $period );
@@ -160,9 +160,9 @@ public function get_pass_count( $period = 'current' ) {
 	 * Retrieve recent LLMS_User_Postmeta for the quiz.
 	 * This overrides the LLMS_Abstract_Post_Data method.
 	 *
-	 * @since    3.16.0
+	 * @since 3.16.0
 	 *
-	 * @return   array
+	 * @return array
 	 */
 	public function recent_events( $args = array() ) {
 
diff --git a/includes/controllers/class.llms.controller.admin.quiz.attempts.php b/includes/controllers/class.llms.controller.admin.quiz.attempts.php
index fa3666b70c..794996a8a8 100644
--- a/includes/controllers/class.llms.controller.admin.quiz.attempts.php
+++ b/includes/controllers/class.llms.controller.admin.quiz.attempts.php
@@ -5,7 +5,7 @@
  * @package LifterLMS/Controllers/Classes
  *
  * @since 3.16.0
- * @version 5.9.0
+ * @version [version]
  */
 
 defined( 'ABSPATH' ) || exit;
@@ -24,17 +24,17 @@ class LLMS_Controller_Admin_Quiz_Attempts {
 	public function __construct() {
 
 		add_action( 'admin_init', array( $this, 'maybe_run_actions' ) );
-
 	}
 
 	/**
-	 * Run actions on form submission
+	 * Run actions on form submission.
 	 *
 	 * @since 3.16.0
 	 * @since 3.16.9 Unknown.
 	 * @since 3.35.0 Sanitize `$_POST` data.
 	 * @since 4.4.4 Made sure to exit after redirecting on attempt deletion.
 	 * @since 5.9.0 Stop using deprecated `FILTER_SANITIZE_STRING`.
+	 * @since [version] Added `llms_quiz_resumable_attempt_action` action and single resumable attempt delete.
 	 *
 	 * @return void
 	 */
@@ -68,9 +68,57 @@ public function maybe_run_actions() {
 				exit();
 			} elseif ( 'llms_attempt_grade' === $action && ( isset( $_POST['remarks'] ) || isset( $_POST['points'] ) ) ) {
 				$this->save_grade( $attempt );
+			} elseif ( 'llms_disable_resume_attempt' === $action ) {
+				$attempt->set( 'can_be_resumed', false );
+				$attempt->save();
+				$attempt->end();
+			}
+		}
+
+		if ( isset( $_POST['llms_quiz_resumable_attempt_action'] ) ) {
+
+			$action = llms_filter_input( INPUT_POST, 'llms_quiz_resumable_attempt_action' );
+
+			if ( 'llms_clear_resumable_attempts' === $action ) {
+
+				$quiz_id = llms_filter_input( INPUT_POST, 'llms_quiz_id' );
+
+				if ( ! current_user_can( 'edit_post', $quiz_id ) ) {
+					return;
+				}
+
+				$resumable_attempts = $this->get_resumable_attempts( $quiz_id );
+
+				foreach ( $resumable_attempts as $attempt_id ) {
+					$attempt = new LLMS_Quiz_Attempt( $attempt_id );
+					$attempt->set( 'can_be_resumed', false );
+					$attempt->save();
+
+					$attempt->end();
+				}
 			}
 		}
+	}
 
+	/**
+	 * Get resumable attempts for a quiz.
+	 *
+	 * @since [version]
+	 *
+	 * @param int $quiz_id Quiz ID.
+	 */
+	public function get_resumable_attempts( $quiz_id ) {
+
+		// Query to get all resumable attempts.
+		$query = new LLMS_Query_Quiz_Attempt(
+			array(
+				'quiz_id'        => $quiz_id,
+				'can_be_resumed' => true,
+				'status'         => 'incomplete',
+			)
+		);
+
+		return wp_list_pluck( $query->get_results(), 'id' );
 	}
 
 	/**
@@ -123,9 +171,7 @@ private function save_grade( $attempt ) {
 		do_action( 'llms_quiz_graded', $attempt->get_student()->get_id(), $attempt->get( 'quiz_id' ), $attempt );
 
 		// phpcs:enable
-
 	}
-
 }
 
 return new LLMS_Controller_Admin_Quiz_Attempts();
diff --git a/includes/forms/class-llms-form-templates.php b/includes/forms/class-llms-form-templates.php
index c605cf967b..6bd1033abb 100644
--- a/includes/forms/class-llms-form-templates.php
+++ b/includes/forms/class-llms-form-templates.php
@@ -52,7 +52,6 @@ private static function add_confirm_group( $block ) {
 			'innerBlocks' => $inner,
 			'attrs'       => $attrs,
 		);
-
 	}
 
 	/**
@@ -88,7 +87,6 @@ private static function create_reusable_block( $field_id ) {
 		);
 
 		return wp_insert_post( $args );
-
 	}
 
 	/**
@@ -113,7 +111,6 @@ public static function find_reusable_block( $field_id ) {
 		);
 
 		return $query->posts ? $query->posts[0] : false;
-
 	}
 
 	/**
@@ -151,7 +148,6 @@ public static function get_block( $field_id, $location, $reusable ) {
 		}
 
 		return $block;
-
 	}
 
 	/**
@@ -175,7 +171,6 @@ private static function get_block_data( $field_id, $confirm = true ) {
 
 		$block = self::prepare_blocks( array( $block ) );
 		return compact( 'title', 'block' );
-
 	}
 
 	/**
@@ -208,7 +203,6 @@ private static function get_confirm_group_controlled( $block ) {
 		);
 
 		return $block;
-
 	}
 
 	/**
@@ -233,7 +227,6 @@ private static function get_confirm_group_controller( $block ) {
 		);
 
 		return $block;
-
 	}
 
 	/**
@@ -264,7 +257,6 @@ private static function get_legacy_option( $field_id, $location ) {
 		}
 
 		return $val;
-
 	}
 
 	/**
@@ -314,7 +306,6 @@ private static function get_reusable_block_schema( $field_id ) {
 		 * @param string $field_id   The field's identifier as found in the block schema list returned by LLMS_Form_Templates::get_reusable_block_schema().
 		 */
 		return apply_filters( 'llms_get_reusable_block_schema', $definition, $field_id );
-
 	}
 
 	/**
@@ -343,7 +334,6 @@ public static function get_template( $location ) {
 		$blocks = self::get_template_blocks( $location, $use_reusable );
 
 		return serialize_blocks( $blocks );
-
 	}
 
 	/**
@@ -395,7 +385,6 @@ private static function get_template_blocks( $location, $reusable ) {
 		}
 
 		return array_filter( $blocks );
-
 	}
 
 	/**
@@ -426,7 +415,6 @@ private static function get_voucher_block() {
 			),
 			'innerContent' => array(),
 		);
-
 	}
 
 	/**
@@ -460,7 +448,6 @@ private static function prepare_block_attrs( $block ) {
 		}
 
 		return $block;
-
 	}
 
 	/**
@@ -493,7 +480,6 @@ private static function prepare_blocks( $blocks ) {
 		}
 
 		return $blocks;
-
 	}
 
 	/**
@@ -515,7 +501,5 @@ private static function set_required_atts( $block, $required ) {
 		}
 
 		return $block;
-
 	}
-
 }
diff --git a/includes/models/model.llms.question.php b/includes/models/model.llms.question.php
index db9220e79f..ec5e266ad8 100644
--- a/includes/models/model.llms.question.php
+++ b/includes/models/model.llms.question.php
@@ -5,7 +5,7 @@
  * @package LifterLMS/Models/Classes
  *
  * @since 1.0.0
- * @version 7.4.1
+ * @version [version]
  */
 
 defined( 'ABSPATH' ) || exit;
@@ -354,14 +354,29 @@ public function get_correct_choice() {
 	}
 
 	/**
-	 * Get the question text (title)
+	 * Get the question text (title).
 	 *
 	 * @since 3.16.0
+	 * @since [version] Added $attempt param.
 	 *
+	 * @param string            $format  Optional. Format of the question text. Accepts 'html' or 'plain'.
+	 * @param LLMS_Quiz_Attempt $attempt Optional. Quiz Attempt object.
 	 * @return string
 	 */
-	public function get_question( $format = 'html' ) {
-		return apply_filters( 'llms_' . $this->get( 'question_type' ) . '_question_get_question', $this->get( 'title' ), $format, $this );
+	public function get_question( $format = 'html', $attempt = null ) {
+		/**
+		 * Filter the question text.
+		 *
+		 * The dynamic portion of this filter, `{$type}`, refers to the question type.
+		 *
+		 * @since [version]
+		 *
+		 * @param string            $title    Question title.
+		 * @param string            $format   Format of the question text. Accepts 'html' or 'plain'.
+		 * @param LLMS_Question     $question Question object.
+		 * @param LLMS_Quiz_Attempt $attempt  Attempt object.
+		 */
+		return apply_filters( "llms_{$this->get( 'question_type' )}_question_get_question", $this->get( 'title' ), $format, $this, $attempt );
 	}
 
 	/**
diff --git a/includes/models/model.llms.quiz.attempt.php b/includes/models/model.llms.quiz.attempt.php
index 66bb090a5c..de30e0c124 100644
--- a/includes/models/model.llms.quiz.attempt.php
+++ b/includes/models/model.llms.quiz.attempt.php
@@ -11,7 +11,7 @@
 defined( 'ABSPATH' ) || exit;
 
 /**
- * LLMS_Quiz_Attempt model class
+ * LLMS_Quiz_Attempt model class.
  *
  * @since 3.9.0
  * @since 3.9.2 Added `calculate_point_weight()`, `get_question_order()`, `is_passing()` methods.
@@ -34,19 +34,23 @@ class LLMS_Quiz_Attempt extends LLMS_Abstract_Database_Store {
 	/**
 	 * Array of table column name => format
 	 *
+	 * @since unknown
+	 * @since [version] Added `can_be_resumed` column.
 	 * @var array
 	 */
 	protected $columns = array(
-		'student_id'  => '%d',
-		'quiz_id'     => '%d',
-		'lesson_id'   => '%d',
-		'start_date'  => '%s',
-		'update_date' => '%s',
-		'end_date'    => '%s',
-		'status'      => '%s',
-		'attempt'     => '%d',
-		'grade'       => '%f',
-		'questions'   => '%s',
+		'student_id'          => '%d',
+		'quiz_id'             => '%d',
+		'lesson_id'           => '%d',
+		'start_date'          => '%s',
+		'update_date'         => '%s',
+		'end_date'            => '%s',
+		'status'              => '%s',
+		'attempt'             => '%d',
+		'grade'               => '%f',
+		'questions'           => '%s',
+		'can_be_resumed'      => '%d',
+		'current_question_id' => '%d',
 	);
 
 	protected $date_created = 'start_date';
@@ -340,7 +344,9 @@ public function get_count( $key ) {
 	 * @return string
 	 */
 	public function get_date( $key, $format = null ) {
-
+		if ( ! $this->get( $key . '_date' ) ) {
+			return '';
+		}
 		$date   = strtotime( $this->get( $key . '_date' ) );
 		$format = ! $format ? get_option( 'date_format' ) . ' ' . get_option( 'time_format' ) : $format;
 		return date_i18n( $format, $date );
@@ -477,18 +483,21 @@ private function get_new_questions() {
 	 * @since 3.9.0
 	 * @since 3.16.0 Unknown.
 	 * @since 4.2.0 Use strict type comparison.
+	 * @since [version] Added `$return` param, by default `"id"`.
 	 *
-	 * @param int $last_question Optional. WP Post ID of the current LLMS_Question the "next" refers to. Default `null`.
-	 * @return int|false
+	 * @param int    $last_question Optional. WP Post ID of the current LLMS_Question the "next" refers to. Default `null`.
+	 * @param string $return        Optional. Return type 'id|array'. Default 'id'.
+	 * @return int|array|false
 	 */
-	public function get_next_question( $last_question = null ) {
+	public function get_next_question( $last_question = null, $return = 'id' ) {
 
 		$next = false;
 
 		foreach ( $this->get_questions() as $question ) {
 
 			if ( $next || is_null( $question['answer'] ) ) {
-				return $question['id'];
+
+				return 'id' === $return ? $question['id'] : $question;
 
 				// When rewinding and moving back through we don't want to skip questions.
 			} elseif ( $last_question && absint( $last_question ) === absint( $question['id'] ) ) {
@@ -499,6 +508,52 @@ public function get_next_question( $last_question = null ) {
 		return false;
 	}
 
+	/**
+	 * Retrieve the previous question in the attempt relative to a given question ID.
+	 *
+	 * @since [version]
+	 *
+	 * @param int $question_id WP Post ID of the current LLMS_Question.
+	 * @return int|false
+	 */
+	public function get_previous_question( $question_id ) {
+
+		$next = false;
+
+		foreach ( array_reverse( $this->get_questions() ) as $question ) {
+
+			if ( $next ) {
+
+				return $question['id'];
+
+			} elseif ( $question_id && absint( $question_id ) === absint( $question['id'] ) ) {
+				$next = true;
+			}
+		}
+
+		return false;
+	}
+
+
+	/**
+	 * Retrieve the question in the attempt.
+	 *
+	 * @since [version]
+	 *
+	 * @param int    $question_id WP Post ID of the required LLMS_Question.
+	 * @param string $return      Optional. Return type 'id|array'. Default 'id'.
+	 * @return int|array|false
+	 */
+	public function get_question( $question_id, $return = 'id' ) {
+
+		$ids   = array_map( 'intval', array_column( $this->get_questions(), 'id' ) );
+		$index = array_search( (int) $question_id, $ids, true );
+		return $index >= 0 ?
+			'id' === $return ? $question_id : $this->get_questions()[ $index ]
+			:
+			false;
+	}
+
 	/**
 	 * Retrieve a permalink for the attempt
 	 *
@@ -553,6 +608,34 @@ public function get_question_objects( $cache = true, $filter_removed = false ) {
 		return $questions;
 	}
 
+	/**
+	 * Retrieve an an answer to a specific question.
+	 *
+	 * @since [version]
+	 *
+	 * @param int     $question_id    Question ID.
+	 * @param boolean $cache          Optional. If `true`, save data to to the object for future gets. Default `true`.
+	 *                                Cached questions won't take into account the `$filte_removed` parameter.
+	 * @param boolean $filter_removed Optional. If `true`, removed questions will be filtered out. Default `false`.
+	 * @return mixed
+	 */
+	public function get_question_answer( $question_id, $cache = true, $filter_removed = false ) {
+
+		$question_objects = $this->get_question_objects( $cache, $filter_removed );
+		if ( ! $question_objects ) {
+			return array();
+		}
+		foreach ( $question_objects as $attempt_question ) {
+			$quiz_question = $attempt_question->get_question();
+			if ( $attempt_question->get_question()->get( 'id' ) === $question_id ) {
+				$answer = $attempt_question->get( 'answer' );
+				break;
+			}
+		}
+
+		return $answer ?? array();
+	}
+
 	/**
 	 * Get an instance of the LLMS_Quiz for the attempt
 	 *
@@ -584,6 +667,9 @@ public function get_student() {
 	 * @return string
 	 */
 	public function get_time( $precision = 2 ) {
+		if ( ! $this->get( 'end_date' ) ) {
+			return esc_html__( 'Unknown', 'lifterlms' );
+		}
 		return llms_get_date_diff( $this->get_date( 'start', 'U' ), $this->get_date( 'end', 'U' ), $precision );
 	}
 
@@ -602,12 +688,13 @@ public function get_title() {
 	}
 
 	/**
-	 * Initialize a new quiz attempt by quiz and lesson for a user
+	 * Initialize a new quiz attempt by quiz and lesson for a user.
 	 *
 	 * If no user found throws an Exception.
 	 *
 	 * @since 3.9.0
-	 * @version 3.16.0
+	 * @since 3.16.0 Unknown.
+	 * @since [version] Set the property `can_be_resumed` on init.
 	 *
 	 * @throws Exception When the user is not logged in.
 	 *
@@ -627,10 +714,12 @@ public static function init( $quiz_id, $lesson_id, $student = null ) {
 
 		// Initialize a new attempt.
 		$attempt = new self();
+		$quiz    = llms_get_post( $quiz_id );
 		$attempt->set( 'quiz_id', $quiz_id );
 		$attempt->set( 'lesson_id', $lesson_id );
 		$attempt->set( 'student_id', $student->get_id() );
 		$attempt->set_status( 'incomplete' );
+		$attempt->set( 'can_be_resumed', $quiz->can_be_resumed() );
 		$attempt->set_questions( $attempt->get_new_questions() );
 
 		$number = 1;
@@ -700,7 +789,7 @@ public static function randomize_attempt_questions( $questions ) {
 	}
 
 	/**
-	 * Determine if the attempt can be autograded
+	 * Determine if the attempt can be autograded.
 	 *
 	 * @since 3.16.0
 	 *
@@ -719,7 +808,25 @@ private function is_auto_gradeable() {
 	}
 
 	/**
-	 * Determine if the attempt was passing
+	 * Determine if the attempt is the last attempt of its quiz.
+	 *
+	 * @since [version]
+	 *
+	 * @return bool
+	 */
+	public function is_last_attempt() {
+
+		$student = llms_get_student( $this->get( 'student_id' ) );
+		if ( ! $student ) {
+			return false;
+		}
+
+		$last_attempt = $student->quizzes()->get_last_attempt( $this->get( 'quiz_id' ) );
+		return $last_attempt && ( $this->get( 'id' ) === $last_attempt->get( 'id' ) );
+	}
+
+	/**
+	 * Determine if the attempt was passing.
 	 *
 	 * @since 3.9.2
 	 * @since 3.16.0 Unknown.
@@ -731,7 +838,56 @@ public function is_passing() {
 	}
 
 	/**
-	 * Translate attempt related strings
+	 * Determine if the attempt can be resumed.
+	 *
+	 * @since [version]
+	 *
+	 * @return boolean
+	 */
+	public function can_be_resumed() {
+
+		return 1 === (int) $this->get( 'can_be_resumed' ) && 'incomplete' === $this->get( 'status' ) && ! $this->has_resume_attempt_time_expired() && $this->is_last_attempt();
+	}
+
+	/**
+	 * Determine if the student's resume quiz attempt time limit is expired.
+	 *
+	 * The default resume quiz attempt time limit for a student is 1 day.
+	 *
+	 * @since [version]
+	 *
+	 * @return bool
+	 */
+	public function has_resume_attempt_time_expired() {
+
+		$student = llms_get_student();
+
+		if ( ! $student ) {
+			return false;
+		}
+
+		if ( ! $this->get( 'start_date' ) ) {
+			return false;
+		}
+		$start_date = $this->get( 'start_date' );
+
+		/**
+		 * Filters the X time for resuming quiz.
+		 *
+		 * @since [version]
+		 *
+		 * @param int $resume_time_period The time period in hours.
+		 */
+		$resume_time_period = apply_filters( 'llms_quiz_attempt_resume_time_period', 24, $this );
+
+		$start_date_obj   = new DateTime( $start_date, wp_timezone() );
+		$current_date_obj = current_datetime();
+
+		return $current_date_obj > $start_date_obj->modify( sprintf( '+%d hours', intval( $resume_time_period ) ) );
+	}
+
+	/**
+	 * Translate attempt related strings.
 	 *
 	 * @since 3.9.0
 	 * @since 3.16.0 Unknown.
@@ -759,7 +915,7 @@ public function l10n( $key ) {
 	}
 
 	/**
-	 * Setter for serialized questions array
+	 * Setter for serialized questions array.
 	 *
 	 * @since 3.16.0
 	 *
@@ -772,7 +928,7 @@ public function set_questions( $questions = array(), $save = false ) {
 	}
 
 	/**
-	 * Set the status of the attempt
+	 * Set the status of the attempt.
 	 *
 	 * @since 3.16.0
 	 * @since 4.0.0 Use strict comparisons.
@@ -816,7 +972,7 @@ public function to_array() {
 	}
 
 	/**
-	 * Delete the object from the database
+	 * Delete the object from the database.
 	 *
 	 * Overrides the parent method to perform other actions before deletion.
 	 *
diff --git a/includes/models/model.llms.quiz.php b/includes/models/model.llms.quiz.php
index 38d35397f9..f7444e6954 100644
--- a/includes/models/model.llms.quiz.php
+++ b/includes/models/model.llms.quiz.php
@@ -21,6 +21,7 @@
  * @property $show_options_description_wrong_answer (yesno) If yes, displays the question description when the student chooses the wrong answer.
  * @property $show_results (yesno) If yes, results will be shown to the student at the conclusion of the quiz.
  * @property $time_limit (int) Quiz time limit (in minutes), empty denotes unlimited (untimed) quiz.
+ * @property $can_be_resumed (yesno) If yes, the latest incomplete quiz attempt can be resumed.
  *
  * @since 3.3.0
  * @since 3.19.2 Unkwnown.
@@ -53,7 +54,8 @@ class LLMS_Quiz extends LLMS_Post_Model {
 	 *
 	 * @since Unknown.
 	 * @since 7.6.2 Added the `disable_retake` property.
-	 * @var string[]
+	 * @since [version] Added `can_be_resumed` property.
+	 * @var string[] Array key is the meta_key and array values is property's type.
 	 */
 	protected $properties = array(
 		'lesson_id'           => 'absint',
@@ -64,6 +66,7 @@ class LLMS_Quiz extends LLMS_Post_Model {
 		'random_questions'    => 'yesno',
 		'show_correct_answer' => 'yesno',
 		'time_limit'          => 'int',
+		'can_be_resumed'      => 'yesno',
 		'disable_retake'      => 'yesno',
 	);
 
@@ -196,7 +199,67 @@ public function is_orphan( $deep = false ) {
 		}
 
 		return false;
+	}
+
+	/**
+	 * Determine if a quiz can be resumed.
+	 *
+	 * A quiz can only be resumed if it's set to be resumed
+	 * and has no time limit.
+	 *
+	 * @since [version]
+	 *
+	 * @return bool
+	 */
+	public function can_be_resumed() {
 
+		return llms_parse_bool( $this->get( 'can_be_resumed' ) ) && ! $this->has_time_limit();
+	}
+
+	/**
+	 * Determine if a student can resume the quiz.
+	 *
+	 * A student can resume the quiz only if their latest attempt can be resumed.
+	 *
+	 * @since [version]
+	 *
+	 * @param int $user_id Optional. WP User ID, none supplied uses current user. Default `null`.
+	 * @return bool
+	 */
+	public function can_be_resumed_by_student( $user_id = null ) {
+
+		$can_be_resumed_by_student = false;
+
+		$student = llms_get_student( $user_id );
+		if ( $student ) {
+			$last_attempt              = $student->quizzes()->get_last_attempt( $this->get( 'id' ) );
+			$can_be_resumed_by_student = $last_attempt && $last_attempt->can_be_resumed();
+		}
+
+		return $can_be_resumed_by_student;
+	}
+
+	/**
+	 * Gets quiz's last attempt key of a user.
+	 *
+	 * @since [version]
+	 *
+	 * @param int $user_id Optional. WP User ID, none supplied uses current user. Default `null`.
+	 * @return string|bool
+	 */
+	public function get_student_last_attempt_key( $user_id = null ) {
+
+		$student          = llms_get_student( $user_id );
+		$last_attempt_key = false;
+
+		if ( $student ) {
+			$last_attempt = $student->quizzes()->get_last_attempt( $this->get( 'id' ) );
+			if ( $last_attempt ) {
+				$last_attempt_key = $last_attempt->get_key();
+			}
+		}
+
+		return $last_attempt_key;
 	}
 
 	/**
@@ -246,7 +309,6 @@ public function is_open( $user_id = null ) {
 		 * @param LLMS_Student|false $student   LLMS_Student instance or false if user not found.
 		 */
 		return apply_filters( 'llms_quiz_is_open', $quiz_open, $user_id, $this->get( 'id' ), $this, $student );
-
 	}
 
 	/**
@@ -293,7 +355,6 @@ protected function toArrayAfter( $arr ) {
 		}
 
 		return $arr;
-
 	}
 
 	/**
@@ -314,7 +375,6 @@ public function get_question_value( $question_id ) {
 		}
 
 		return 0;
-
 	}
 
 	/**
@@ -328,7 +388,5 @@ private function get_questions_raw() {
 
 		$q = get_post_meta( $this->get( 'id' ), $this->meta_prefix . 'questions', true );
 		return $q ? $q : array();
-
 	}
-
 }
diff --git a/templates/admin/reporting/tabs/quizzes/attempt.php b/templates/admin/reporting/tabs/quizzes/attempt.php
index fcdef1bc76..e4564c4a4f 100644
--- a/templates/admin/reporting/tabs/quizzes/attempt.php
+++ b/templates/admin/reporting/tabs/quizzes/attempt.php
@@ -7,6 +7,7 @@
  * @since 3.16.0
  * @since 3.17.3 Unknown.
  * @since 5.3.0 Do not show the "Start a review" button, if there are no existing questions to review.
+ * @since [version] Add information on whether the attempt can be resumed or not and disable resume attempt button.
  *
  * @param LLMS_Quiz_Attempt $attempt Quiz attempt object.
  */
@@ -87,12 +88,16 @@
 				$icon = 'question-circle';
 		}
 
+		if ( $attempt->can_be_resumed() && $attempt->is_last_attempt() ) {
+			$additional = ' - <i>' . esc_html__( 'Can be resumed', 'lifterlms' ) . '</i>';
+		}
+
 		LLMS_Admin_Reporting::output_widget(
 			array(
 				'cols'      => 'd-1of4',
 				'icon'      => $icon,
 				'id'        => 'llms-reporting-quiz-attempt-status',
-				'data'      => $attempt->l10n( 'status' ),
+				'data'      => $attempt->l10n( 'status' ) . ( $additional ?? '' ),
 				'data_type' => 'text',
 				'text'      => __( 'Status', 'lifterlms' ),
 			)
@@ -154,6 +159,12 @@
 					</span>
 			</button>
 			<?php endif; ?>
+			<?php if ( $attempt->can_be_resumed() ) : // Show the clear resume attempt button only if quiz can be resumed. ?>
+			<button class="llms-button-secondary large" name="llms_quiz_attempt_action" type="submit" value="llms_disable_resume_attempt">
+				<i class="fa fa-ban" aria-hidden="true"></i>
+				<?php esc_html_e( 'Disable Resume Attempt', 'lifterlms' ); ?>
+			</button>
+			<?php endif; ?>
 			<button class="llms-button-danger large" name="llms_quiz_attempt_action" type="submit" value="llms_attempt_delete">
 				<i class="fa fa-trash-o" aria-hidden="true"></i>
 				<?php esc_html_e( 'Delete Attempt', 'lifterlms' ); ?>
diff --git a/templates/content-single-question.php b/templates/content-single-question.php
index 1c824eea2d..c534f71332 100644
--- a/templates/content-single-question.php
+++ b/templates/content-single-question.php
@@ -2,8 +2,10 @@
 /**
  * Single Question Template
  *
- * @since    1.0.0
- * @version 3.16.0
+ * @since 1.0.0
+ * @since 3.16.0 Unknown.
+ * @since [version] Pass the `$attempt` object when retrieving the question content via `$question->get_question();`
+ * @version [version]
  *
  * @arg  $attempt  (obj)  LLMS_Quiz_Attempt instance
  * @arg  $question (obj)  LLMS_Question instance
@@ -21,7 +23,7 @@
 	<h3 class="llms-question-text">
 	<?php
 			// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- Escaped in the question templates.
-			echo $question->get_question();
+			echo $question->get_question( 'html', $attempt );
 	?>
 	</h3>
 
diff --git a/templates/quiz/questions/content-choice.php b/templates/quiz/questions/content-choice.php
index f95d49895a..d0b12afdc5 100644
--- a/templates/quiz/questions/content-choice.php
+++ b/templates/quiz/questions/content-choice.php
@@ -4,24 +4,28 @@
  *
  * @package LifterLMS/Templates
  *
- * @since    3.16.0
- * @version  3.16.0
+ * @since 3.16.0
+ * @since [version] Account for question answers.
+ * @version [version]
  *
- * @arg  $attempt  (obj)  LLMS_Quiz_Attempt instance
- * @arg  $question (obj)  LLMS_Question instance
+ * @param $attempt  LLMS_Quiz_Attempt LLMS_Quiz_Attempt instance.
+ * @param $question LLMS_Question     LLMS_Question instance.
  */
 
 defined( 'ABSPATH' ) || exit;
 
-$input_type = ( 'yes' === $question->get( 'multi_choices' ) ) ? 'checkbox' : 'radio';
+$input_type      = ( 'yes' === $question->get( 'multi_choices' ) ) ? 'checkbox' : 'radio';
+$question_answer = isset( $attempt ) && $attempt ? $attempt->get_question_answer( $question->get( 'id' ) ) : array();
 ?>
 
 <ol class="llms-question-choices">
 	<?php foreach ( $question->get_choices() as $choice ) : ?>
-
+		<?php
+		$answer = is_array( $question_answer ) ? in_array( $choice->get( 'id' ), $question_answer, true ) ? $choice->get( 'id' ) : null : null;
+		?>
 		<li class="llms-choice type--text" id="choice-wrapper-<?php echo esc_attr( $choice->get( 'id' ) ); ?>">
 			<label for="choice-<?php echo esc_attr( $choice->get( 'id' ) ); ?>">
-				<input id="choice-<?php echo esc_attr( $choice->get( 'id' ) ); ?>" name="question_<?php echo esc_attr( $question->get( 'id' ) ); ?>[]" type="<?php echo esc_attr( $input_type ); ?>" value="<?php echo esc_attr( $choice->get( 'id' ) ); ?>">
+				<input id="choice-<?php echo esc_attr( $choice->get( 'id' ) ); ?>" name="question_<?php echo esc_attr( $question->get( 'id' ) ); ?>[]" type="<?php echo esc_attr( $input_type ); ?>" value="<?php echo esc_attr( $choice->get( 'id' ) ); ?>" <?php checked( $answer, $choice->get( 'id' ) ); ?>>
 				<span class="llms-marker type--<?php echo esc_attr( $input_type ); ?>">
 					<span class="iterator"><?php echo esc_html( $choice->get( 'marker' ) ); ?></span>
 					<i class="fa fa-check"></i>
diff --git a/templates/quiz/questions/content-picture_choice.php b/templates/quiz/questions/content-picture_choice.php
index 76839cbc08..a06f668c3d 100644
--- a/templates/quiz/questions/content-picture_choice.php
+++ b/templates/quiz/questions/content-picture_choice.php
@@ -6,7 +6,8 @@
  *
  * @since 3.16.0
  * @since 5.9.0 Use `llms-flex-cols` in favor of `llms-cols` for arranging choices in columns.
- * @version 3.16.0
+ * @since [version] Account for question answers.
+ * @version [version]
  *
  * @var LLMS_Quiz_Attempt $attempt  Current quiz attempt object.
  * @var LLMS_Question     $question Question object.
@@ -14,17 +15,20 @@
 
 defined( 'ABSPATH' ) || exit;
 
-$input_type = ( 'yes' === $question->get( 'multi_choices' ) ) ? 'checkbox' : 'radio';
-$choices    = $question->get_choices();
-$cols       = llms_get_picture_choice_question_cols( count( $choices ) );
+$input_type      = ( 'yes' === $question->get( 'multi_choices' ) ) ? 'checkbox' : 'radio';
+$choices         = $question->get_choices();
+$cols            = llms_get_picture_choice_question_cols( count( $choices ) );
+$question_answer = isset( $attempt ) && $attempt ? $attempt->get_question_answer( $question->get( 'id' ) ) : array();
 ?>
 
 <ol class="llms-question-choices llms-flex-cols">
 	<?php foreach ( $choices as $choice ) : ?>
-
+		<?php
+		$answer = is_array( $question_answer ) ? in_array( $choice->get( 'id' ), $question_answer, true ) ? $choice->get( 'id' ) : null : null;
+		?>
 		<li class="llms-choice type--picture llms-col-<?php echo absint( $cols ); ?>" id="choice-wrapper-<?php echo esc_attr( $choice->get( 'id' ) ); ?>">
 			<label for="choice-<?php echo esc_attr( $choice->get( 'id' ) ); ?>">
-				<input id="choice-<?php echo esc_attr( $choice->get( 'id' ) ); ?>" name="question_<?php echo esc_attr( $question->get( 'id' ) ); ?>[]" type="<?php echo esc_attr( $input_type ); ?>" value="<?php echo esc_attr( $choice->get( 'id' ) ); ?>">
+				<input id="choice-<?php echo esc_attr( $choice->get( 'id' ) ); ?>" name="question_<?php echo esc_attr( $question->get( 'id' ) ); ?>[]" type="<?php echo esc_attr( $input_type ); ?>" value="<?php echo esc_attr( $choice->get( 'id' ) ); ?>" <?php checked( $answer, $choice->get( 'id' ) ); ?>>
 				<span class="llms-marker type--<?php echo esc_attr( $input_type ); ?>">
 					<span class="iterator"><?php echo esc_attr( $choice->get( 'marker' ) ); ?></span>
 					<i class="fa fa-check"></i>
diff --git a/templates/quiz/results-attempt-questions-list.php b/templates/quiz/results-attempt-questions-list.php
index f7dc3b7050..3a82d02540 100644
--- a/templates/quiz/results-attempt-questions-list.php
+++ b/templates/quiz/results-attempt-questions-list.php
@@ -2,13 +2,15 @@
 /**
  * List of attempt questions/answers for a single attempt
  *
- * @since 3.16.0
+ * @param LLMS_Quiz_Attempt $attempt LLMS_Quiz_Attempt instance.
+ *
  * @since 3.17.8 Unknown.
  * @since 5.3.0 Display removed questions too.
  * @since 7.3.0 Script moved into the main llms.js.
+ * @since [version] Hide answers if resumable attempt is incomplete.
  * @version 7.3.0
  *
- * @param LLMS_Quiz_Attempt $attempt LLMS_Quiz_Attempt instance.
+ * @since 3.16.0
  */
 
 defined( 'ABSPATH' ) || exit;
@@ -16,26 +18,33 @@
 ?>
 
 <ol class="llms-quiz-attempt-results">
-<?php
-foreach ( $attempt->get_question_objects() as $attempt_question ) :
-	$quiz_question = $attempt_question->get_question();
-	if ( ! $quiz_question ) { // Question missing/deleted.
-		?>
-		<li class="llms-quiz-attempt-question type--removed status--<?php echo esc_attr( $attempt_question->get_status() ); ?> <?php echo $attempt_question->is_correct() ? 'correct' : 'incorrect'; ?>">
+<?php if ( ! $attempt->can_be_resumed() ) : ?>
+	<?php
+	foreach ( $attempt->get_question_objects() as $attempt_question ) :
+		$quiz_question = $attempt_question->get_question();
+		if ( ! $quiz_question ) { // Question missing/deleted.
+			?>
+		<li class="llms-quiz-attempt-question type--<?php echo esc_attr( $quiz_question->get( 'question_type' ) ); ?> status--<?php echo esc_attr( $attempt_question->get_status() ); ?> <?php echo $attempt_question->is_correct() ? 'correct' : 'incorrect'; ?>"
+			data-question-id="<?php echo esc_attr( $quiz_question->get( 'id' ) ); ?>"
+			data-grading-manual="<?php echo $attempt_question->can_be_manually_graded() ? 'yes' : 'no'; ?>"
+			data-points="<?php echo esc_attr( $attempt_question->get( 'points' ) ); ?>"
+			data-points-curr="<?php echo esc_attr( $attempt_question->get( 'earned' ) ); ?>">
 			<header class="llms-quiz-attempt-question-header">
 				<span class="toggle-answer">
 					<h3 class="llms-question-title"><?php esc_html_e( 'This question has been deleted', 'lifterlms' ); ?></h3>
 					<span class="llms-points">
-						<?php echo esc_html( sprintf( __( '%1$d / %2$d points', 'lifterlms' ), $attempt_question->get( 'earned' ), $attempt_question->get( 'points' ) ) ); ?>
+						<?php if ( $quiz_question->get( 'points' ) ) : ?>
+							<?php echo esc_html( sprintf( __( '%1$d / %2$d points', 'lifterlms' ), $attempt_question->get( 'earned' ), $attempt_question->get( 'points' ) ) ); ?>
+						<?php endif; ?>
 					</span>
 					<?php echo wp_kses_post( $attempt_question->get_status_icon() ); ?>
 				</span>
 			</header>
 		</li>
-		<?php
-		continue;
-	}
-	?>
+			<?php
+			continue;
+		}
+		?>
 
 	<li class="llms-quiz-attempt-question type--<?php echo esc_attr( $quiz_question->get( 'question_type' ) ); ?> status--<?php echo esc_attr( $attempt_question->get_status() ); ?> <?php echo $attempt_question->is_correct() ? 'correct' : 'incorrect'; ?>"
 		data-question-id="<?php echo esc_attr( $quiz_question->get( 'id' ) ); ?>"
@@ -102,5 +111,12 @@
 		</section>
 
 	</li>
-<?php endforeach; ?>
+	<?php endforeach; ?>
+<?php else : ?>
+	<?php if ( is_admin() ) : ?>
+		<p><?php esc_html_e( 'The quiz is still ongoing.', 'lifterlms' ); ?></p>
+	<?php else : ?>
+		<p><?php esc_html_e( "The quiz is still ongoing. You can resume your attempt by clicking the 'Resume Quiz' button.", 'lifterlms' ); ?></p>
+	<?php endif; ?>
+<?php endif; ?>
 </ol>
diff --git a/templates/quiz/results-attempt.php b/templates/quiz/results-attempt.php
index c1bff6ab29..731ddde502 100644
--- a/templates/quiz/results-attempt.php
+++ b/templates/quiz/results-attempt.php
@@ -2,10 +2,12 @@
 /**
  * Quiz Single Attempt Results
  *
- * @since    3.16.0
+ * @param LLMS_Quiz_Attempt $attempt LLMS_Quiz_Attempt instance.
+ *
  * @version  3.27.0
+ * @since [version] Hide answers if resumable attempt is incomplete.
  *
- * @arg  $attempt  (obj)  LLMS_Quiz_Attempt instance
+ * @since    3.16.0
  */
 defined( 'ABSPATH' ) || exit;
 
@@ -20,18 +22,20 @@
 
 <h2 class="llms-quiz-results-title"><?php echo esc_html( sprintf( __( 'Attempt #%d Results', 'lifterlms' ), $attempt->get( 'attempt' ) ) ); ?></h2>
 
-<aside class="llms-quiz-results-aside">
-	<?php if ( $attempt->get_count( 'available_points' ) ) : ?>
-		<?php echo wp_kses_post( llms_get_donut( $attempt->get( 'grade' ), $attempt->l10n( 'status' ), 'default', array( $donut_class ) ) ); ?>
-	<?php endif; ?>
-	<ul class="llms-quiz-meta-info">
-		<?php if ( $attempt->get_count( 'gradeable_questions' ) ) : ?>
-			<li class="llms-quiz-meta-item"><?php echo esc_html( sprintf( __( 'Correct Answers: %1$d / %2$d', 'lifterlms' ), $attempt->get_count( 'correct_answers' ), $attempt->get_count( 'gradeable_questions' ) ) ); ?></li>
+<?php if ( ! $attempt->can_be_resumed() ) : ?>
+	<aside class="llms-quiz-results-aside">
+		<?php if ( $attempt->get_count( 'available_points' ) ) : ?>
+			<?php echo wp_kses_post( llms_get_donut( $attempt->get( 'grade' ), $attempt->l10n( 'status' ), 'default', array( $donut_class ) ) ); ?>
 		<?php endif; ?>
-		<li class="llms-quiz-meta-item"><?php echo esc_html( sprintf( __( 'Completed: %s', 'lifterlms' ), $attempt->get_date( 'start' ) ) ); ?></li>
-		<li class="llms-quiz-meta-item"><?php echo esc_html( sprintf( __( 'Total time: %s', 'lifterlms' ), $attempt->get_time() ) ); ?></li>
-	</ul>
-</aside>
+		<ul class="llms-quiz-meta-info">
+			<?php if ( $attempt->get_count( 'gradeable_questions' ) ) : ?>
+				<li class="llms-quiz-meta-item"><?php echo esc_html( sprintf( __( 'Correct Answers: %1$d / %2$d', 'lifterlms' ), $attempt->get_count( 'correct_answers' ), $attempt->get_count( 'gradeable_questions' ) ) ); ?></li>
+			<?php endif; ?>
+			<li class="llms-quiz-meta-item"><?php echo esc_html( sprintf( __( 'Completed: %s', 'lifterlms' ), $attempt->get_date( 'start' ) ) ); ?></li>
+			<li class="llms-quiz-meta-item"><?php echo esc_html( sprintf( __( 'Total time: %s', 'lifterlms' ), $attempt->get_time() ) ); ?></li>
+		</ul>
+	</aside>
+<?php endif; ?>
 
 <section class="llms-quiz-results-main">
 
diff --git a/templates/quiz/results.php b/templates/quiz/results.php
index a9c745cc87..7d0b935521 100644
--- a/templates/quiz/results.php
+++ b/templates/quiz/results.php
@@ -8,7 +8,8 @@
  * @since 3.35.0 Access `$_GET` data via `llms_filter_input()`.
  * @since 4.17.0 Return early if accessed without a logged in user.
  * @since 5.9.0 Stop using deprecated `FILTER_SANITIZE_STRING`.
- * @version 5.9.0
+ * @since [version] Don't try to round nulls.
+ * @version [version]
  *
  * @property LLMS_Quiz_Attempt $attempt Attempt object.
  */
@@ -72,7 +73,7 @@
 				<?php foreach ( $attempts as $attempt ) : ?>
 					<option value="<?php echo esc_url( $attempt->get_permalink() ); ?>">
 						<?php // Translators: %1$d = Attempt number; %2$s = Grade percentage; %3$s = Pass/fail text. ?>
-						<?php echo esc_html( sprintf( __( 'Attempt #%1$d - %2$s (%3$s)', 'lifterlms' ), $attempt->get( 'attempt' ), round( $attempt->get( 'grade' ), 2 ) . '%', $attempt->l10n( 'status' ) ) ); ?>
+						<?php echo esc_html( sprintf( __( 'Attempt #%1$d - %2$s (%3$s)', 'lifterlms' ), $attempt->get( 'attempt' ), round( $attempt->get( 'grade' ) ?? 0, 2 ) . '%', $attempt->l10n( 'status' ) ) ); ?>
 					</option>
 				<?php endforeach; ?>
 			</select>
diff --git a/templates/quiz/start-button.php b/templates/quiz/start-button.php
index 1bf45f83b3..ceb291545e 100644
--- a/templates/quiz/start-button.php
+++ b/templates/quiz/start-button.php
@@ -5,6 +5,8 @@
  * @since 1.0.0
  * @since 3.25.0 Unknown.
  * @since 4.17.0 Early bail on orphan quiz.
+ * @since [version] Added support for quiz resume.
+ * @version [version]
  */
 
 defined( 'ABSPATH' ) || exit;
@@ -31,9 +33,8 @@
 
 	<?php if ( $quiz ) : ?>
 
-		<form method="POST" action="" name="llms_start_quiz" enctype="multipart/form-data">
-
-			<?php if ( $quiz->is_open() ) : ?>
+		<?php if ( $quiz->is_open() ) : ?>
+			<form method="POST" action="" name="llms_start_quiz" enctype="multipart/form-data">
 
 				<input id="llms-lesson-id" name="llms_lesson_id" type="hidden" value="<?php echo esc_attr( $lesson->get( 'id' ) ); ?>"/>
 				<input id="llms-quiz-id" name="llms_quiz_id" type="hidden" value="<?php echo esc_attr( $quiz->get( 'id' ) ); ?>"/>
@@ -42,10 +43,13 @@
 
 				<?php wp_nonce_field( 'llms_start_quiz' ); ?>
 
-				<button class="llms-start-quiz-button llms-button-action button" id="llms_start_quiz" name="llms_start_quiz" type="submit">
+				<?php if ( $quiz->can_be_resumed_by_student() ) : ?>
 					<?php
+						$message  = esc_html__( 'You have a partially completed attempt for this quiz. You can continue where you left off by clicking the Resume Quiz button below.', 'lifterlms' );
+						$message .= '<div><button class="llms-start-quiz-button llms-button-secondary button" id="llms_start_quiz" name="llms_start_quiz" type="submit">';
+
 						/**
-						 * Filters the quiz button text
+						 * Filters the restart quiz button text
 						 *
 						 * @since Unknown
 						 *
@@ -53,18 +57,64 @@
 						 * @param LLMS_Quiz   $quiz        The current quiz instance.
 						 * @param LLMS_Lesson $lesson      The parent lesson instance.
 						 */
-						echo wp_kses_post( apply_filters( 'lifterlms_begin_quiz_button_text', __( 'Start Quiz', 'lifterlms' ), $quiz, $lesson ) );
+						$message .= wp_kses_post( apply_filters( 'lifterlms_restart_quiz_button_text', __( 'Restart Quiz Instead', 'lifterlms' ), $quiz, $lesson ) );
+
+						$message .= '</button></div>';
+					?>
+					<?php llms_print_notice( $message, 'notice' ); ?>
+				<?php else : ?>
+
+					<button class="llms-start-quiz-button llms-button-action button" id="llms_start_quiz" name="llms_start_quiz" type="submit">
+						<?php
+							/**
+							 * Filters the quiz button text
+							 *
+							 * @since Unknown
+							 *
+							 * @param string      $button_text The start quiz button text.
+							 * @param LLMS_Quiz   $quiz        The current quiz instance.
+							 * @param LLMS_Lesson $lesson      The parent lesson instance.
+							 */
+							echo wp_kses_post( apply_filters( 'lifterlms_begin_quiz_button_text', __( 'Start Quiz', 'lifterlms' ), $quiz, $lesson ) );
+						?>
+					</button>
+				<?php endif; ?>
+			</form>
+
+		<?php else : ?>
+			<p><?php esc_html_e( 'You are not able to take this quiz', 'lifterlms' ); ?></p>
+		<?php endif; ?>
+
+		<?php if ( $quiz->can_be_resumed_by_student() ) : ?>
+			<form method="POST" action="" name="llms_resume_quiz" enctype="multipart/form-data">
+
+				<input id="llms-attempt-key" name="llms_attempt_key" type="hidden" value="<?php echo esc_attr( $quiz->get_student_last_attempt_key() ); ?>"/>
+
+				<input type="hidden" name="action" value="llms_resume_quiz" />
+
+				<?php wp_nonce_field( 'llms_resume_quiz' ); ?>
+
+				<button class="llms-resume-quiz-button llms-button-action button" id="llms_resume_quiz" name="llms_resume_quiz" type="submit">
+					<?php
+						/**
+						 * Filters the quiz resume button text.
+						 *
+						 * @since [version]
+						 *
+						 * @param string      $button_text The resume quiz button text.
+						 * @param LLMS_Quiz   $quiz        The current quiz instance.
+						 * @param LLMS_Lesson $lesson      The parent lesson instance.
+						 */
+						echo esc_html( apply_filters( 'lifterlms_resume_quiz_button_text', esc_html__( 'Resume Quiz', 'lifterlms' ), $quiz, $lesson ) );
 					?>
 				</button>
 
-			<?php else : ?>
-				<p><?php esc_html_e( 'You are not able to take this quiz', 'lifterlms' ); ?></p>
-			<?php endif; ?>
+			</form>
+		<?php endif; ?>
 
-			<?php if ( $lesson->get_next_lesson() && llms_is_complete( get_current_user_id(), $lesson->get( 'id' ), 'lesson' ) ) : ?>
-				<a href="<?php echo esc_url( get_permalink( $lesson->get_next_lesson() ) ); ?>" class="button llms-button-secondary llms-next-lesson"><?php esc_html_e( 'Next Lesson', 'lifterlms' ); ?></a>
-			<?php endif; ?>
-		</form>
+		<?php if ( $lesson->get_next_lesson() && llms_is_complete( get_current_user_id(), $lesson->get( 'id' ), 'lesson' ) ) : ?>
+			<a href="<?php echo esc_url( get_permalink( $lesson->get_next_lesson() ) ); ?>" class="button llms-button-secondary llms-next-lesson"><?php esc_html_e( 'Next Lesson', 'lifterlms' ); ?></a>
+		<?php endif; ?>
 
 	<?php else : ?>
 
diff --git a/tests/assets/import-with-quiz.json b/tests/assets/import-with-quiz.json
index d51bb86676..f3cc5ed149 100644
--- a/tests/assets/import-with-quiz.json
+++ b/tests/assets/import-with-quiz.json
@@ -182,6 +182,7 @@
             "modified_gmt": "2020-08-04 23:10:23",
             "name": "new-lesson-quiz",
             "passing_percent": 85,
+            "can_be_resumed": "yes",
             "password": "",
             "permalink": "http://localhost:8080/quiz/new-lesson-quiz/",
             "ping_status": "closed",
diff --git a/tests/phpunit/unit-tests/ajax/class-llms-test-ajax-handler-quizzes.php b/tests/phpunit/unit-tests/ajax/class-llms-test-ajax-handler-quizzes.php
index 7249262926..48d8eb788f 100644
--- a/tests/phpunit/unit-tests/ajax/class-llms-test-ajax-handler-quizzes.php
+++ b/tests/phpunit/unit-tests/ajax/class-llms-test-ajax-handler-quizzes.php
@@ -190,9 +190,10 @@ public function test_quiz_answer_question_test_attempts_limit() {
 			)
 		);
 
+		// The status is "pass" so it won't be possible to answer the question again anyway (500 vs 400).
 		$this->assertIsWPError( $res );
-		$this->assertWPErrorCodeEquals( 400, $res );
-		$this->assertWPErrorMessageEquals( "You've reached the maximum number of attempts for this quiz.", $res );
+		$this->assertWPErrorCodeEquals( 500, $res );
+		$this->assertWPErrorMessageEquals( "There was an error recording your answer. Please return to the lesson and begin again.", $res );
 
 		// Reset.
 		$this->quiz->set( 'limit_attempts', 'no' );