diff --git a/app/src/main/java/org/oppia/android/app/administratorcontrols/AdministratorControlsActivity.kt b/app/src/main/java/org/oppia/android/app/administratorcontrols/AdministratorControlsActivity.kt
index 2cda2286d02..64beda78f53 100644
--- a/app/src/main/java/org/oppia/android/app/administratorcontrols/AdministratorControlsActivity.kt
+++ b/app/src/main/java/org/oppia/android/app/administratorcontrols/AdministratorControlsActivity.kt
@@ -3,6 +3,7 @@ package org.oppia.android.app.administratorcontrols
 import android.content.Context
 import android.content.Intent
 import android.os.Bundle
+import androidx.activity.OnBackPressedCallback
 import org.oppia.android.R
 import org.oppia.android.app.activity.ActivityComponentImpl
 import org.oppia.android.app.activity.InjectableAutoLocalizedAppCompatActivity
@@ -83,6 +84,15 @@ class AdministratorControlsActivity :
       isProfileDeletionDialogVisible
     )
     title = resourceHandler.getStringInLocale(R.string.administrator_controls)
+
+    onBackPressedDispatcher.addCallback(
+      this,
+      object : OnBackPressedCallback(/* enabled = */ true) {
+        override fun handleOnBackPressed() {
+          this@AdministratorControlsActivity.handleBackPress()
+        }
+      }
+    )
   }
 
   override fun routeToAppVersion() {
@@ -121,7 +131,7 @@ class AdministratorControlsActivity :
     }
   }
 
-  override fun onBackPressed() {
+  private fun handleBackPress() {
     val fragment =
       supportFragmentManager.findFragmentById(
         R.id.administrator_controls_fragment_multipane_placeholder
@@ -134,8 +144,7 @@ class AdministratorControlsActivity :
     if (fragment is ProfileEditFragment) {
       administratorControlsActivityPresenter.handleOnBackPressed()
     } else {
-      @Suppress("DEPRECATION") // TODO(#5404): Migrate to a back pressed dispatcher.
-      super.onBackPressed()
+      finish()
     }
   }
 
diff --git a/app/src/main/java/org/oppia/android/app/administratorcontrols/appversion/AppVersionActivity.kt b/app/src/main/java/org/oppia/android/app/administratorcontrols/appversion/AppVersionActivity.kt
index e41600bb929..f78d770df1d 100644
--- a/app/src/main/java/org/oppia/android/app/administratorcontrols/appversion/AppVersionActivity.kt
+++ b/app/src/main/java/org/oppia/android/app/administratorcontrols/appversion/AppVersionActivity.kt
@@ -4,6 +4,7 @@ import android.content.Context
 import android.content.Intent
 import android.os.Bundle
 import android.view.MenuItem
+import androidx.activity.OnBackPressedCallback
 import org.oppia.android.app.activity.ActivityComponentImpl
 import org.oppia.android.app.activity.InjectableAutoLocalizedAppCompatActivity
 import org.oppia.android.app.model.ScreenName.APP_VERSION_ACTIVITY
@@ -19,12 +20,20 @@ class AppVersionActivity : InjectableAutoLocalizedAppCompatActivity() {
     super.onCreate(savedInstanceState)
     (activityComponent as ActivityComponentImpl).inject(this)
     appVersionActivityPresenter.handleOnCreate()
+
+    onBackPressedDispatcher.addCallback(
+      this,
+      object : OnBackPressedCallback(/* enabled = */ true) {
+        override fun handleOnBackPressed() {
+          finish()
+        }
+      }
+    )
   }
 
   override fun onOptionsItemSelected(item: MenuItem): Boolean {
     if (item.itemId == android.R.id.home) {
-      @Suppress("DEPRECATION") // TODO(#5404): Migrate to a back pressed dispatcher.
-      onBackPressed()
+      onBackPressedDispatcher.onBackPressed()
     }
     return super.onOptionsItemSelected(item)
   }
diff --git a/app/src/main/java/org/oppia/android/app/administratorcontrols/learneranalytics/ProfileAndDeviceIdActivity.kt b/app/src/main/java/org/oppia/android/app/administratorcontrols/learneranalytics/ProfileAndDeviceIdActivity.kt
index cf6fb025db6..45a27fac5b8 100644
--- a/app/src/main/java/org/oppia/android/app/administratorcontrols/learneranalytics/ProfileAndDeviceIdActivity.kt
+++ b/app/src/main/java/org/oppia/android/app/administratorcontrols/learneranalytics/ProfileAndDeviceIdActivity.kt
@@ -4,6 +4,7 @@ import android.content.Context
 import android.content.Intent
 import android.os.Bundle
 import android.view.MenuItem
+import androidx.activity.OnBackPressedCallback
 import org.oppia.android.app.activity.ActivityComponentImpl
 import org.oppia.android.app.activity.InjectableAutoLocalizedAppCompatActivity
 import org.oppia.android.app.model.ScreenName.PROFILE_AND_DEVICE_ID_ACTIVITY
@@ -18,18 +19,27 @@ import javax.inject.Inject
  * a particular user or group.
  */
 class ProfileAndDeviceIdActivity : InjectableAutoLocalizedAppCompatActivity() {
-  @Inject lateinit var profileAndDeviceIdActivityPresenter: ProfileAndDeviceIdActivityPresenter
+  @Inject
+  lateinit var profileAndDeviceIdActivityPresenter: ProfileAndDeviceIdActivityPresenter
 
   override fun onCreate(savedInstanceState: Bundle?) {
     super.onCreate(savedInstanceState)
     (activityComponent as ActivityComponentImpl).inject(this)
     profileAndDeviceIdActivityPresenter.handleOnCreate()
+
+    onBackPressedDispatcher.addCallback(
+      this,
+      object : OnBackPressedCallback(/* enabled = */ true) {
+        override fun handleOnBackPressed() {
+          finish()
+        }
+      }
+    )
   }
 
   override fun onOptionsItemSelected(item: MenuItem): Boolean {
     if (item.itemId == android.R.id.home) {
-      @Suppress("DEPRECATION") // TODO(#5404): Migrate to a back pressed dispatcher.
-      onBackPressed()
+      onBackPressedDispatcher.onBackPressed()
     }
     return super.onOptionsItemSelected(item)
   }
diff --git a/app/src/main/java/org/oppia/android/app/databinding/TextViewBindingAdapters.java b/app/src/main/java/org/oppia/android/app/databinding/TextViewBindingAdapters.java
index e4584d7cad1..284e1332b2d 100644
--- a/app/src/main/java/org/oppia/android/app/databinding/TextViewBindingAdapters.java
+++ b/app/src/main/java/org/oppia/android/app/databinding/TextViewBindingAdapters.java
@@ -68,15 +68,14 @@ public static void setDrawableEndCompat(
   }
 
   private static String getTimeAgo(View view, long lastVisitedTimestamp) {
-    long timeStampMillis = ensureTimestampIsInMilliseconds(lastVisitedTimestamp);
     long currentTimeMillis = getOppiaClock(view).getCurrentTimeMs();
     AppLanguageResourceHandler resourceHandler = getResourceHandler(view);
 
-    if (timeStampMillis > currentTimeMillis || timeStampMillis <= 0) {
+    if (lastVisitedTimestamp > currentTimeMillis || lastVisitedTimestamp <= 0) {
       return resourceHandler.getStringInLocale(R.string.last_logged_in_recently);
     }
 
-    long timeDifferenceMillis = currentTimeMillis - timeStampMillis;
+    long timeDifferenceMillis = currentTimeMillis - lastVisitedTimestamp;
 
     if (timeDifferenceMillis < (int) TimeUnit.MINUTES.toMillis(1)) {
       return resourceHandler.getStringInLocale(R.string.just_now);
@@ -112,15 +111,6 @@ private static String getPluralString(
         );
   }
 
-  private static long ensureTimestampIsInMilliseconds(long lastVisitedTimestamp) {
-    // TODO(#3842): Investigate & remove this check.
-    if (lastVisitedTimestamp < 1000000000000L) {
-      // If timestamp is given in seconds, convert that to milliseconds.
-      return TimeUnit.SECONDS.toMillis(lastVisitedTimestamp);
-    }
-    return lastVisitedTimestamp;
-  }
-
   private static AppLanguageResourceHandler getResourceHandler(View view) {
     AppLanguageActivityInjectorProvider provider =
         (AppLanguageActivityInjectorProvider) getAttachedActivity(view);
diff --git a/app/src/main/java/org/oppia/android/app/devoptions/markchapterscompleted/MarkChaptersCompletedActivity.kt b/app/src/main/java/org/oppia/android/app/devoptions/markchapterscompleted/MarkChaptersCompletedActivity.kt
index ec8979dad41..cc1a7897150 100644
--- a/app/src/main/java/org/oppia/android/app/devoptions/markchapterscompleted/MarkChaptersCompletedActivity.kt
+++ b/app/src/main/java/org/oppia/android/app/devoptions/markchapterscompleted/MarkChaptersCompletedActivity.kt
@@ -4,6 +4,7 @@ import android.content.Context
 import android.content.Intent
 import android.os.Bundle
 import android.view.MenuItem
+import androidx.activity.OnBackPressedCallback
 import org.oppia.android.R
 import org.oppia.android.app.activity.ActivityComponentImpl
 import org.oppia.android.app.activity.InjectableAutoLocalizedAppCompatActivity
@@ -37,12 +38,20 @@ class MarkChaptersCompletedActivity : InjectableAutoLocalizedAppCompatActivity()
     val showConfirmationNotice = args?.showConfirmationNotice ?: false
     markChaptersCompletedActivityPresenter.handleOnCreate(internalProfileId, showConfirmationNotice)
     title = resourceHandler.getStringInLocale(R.string.mark_chapters_completed_activity_title)
+
+    onBackPressedDispatcher.addCallback(
+      this,
+      object : OnBackPressedCallback(/* enabled = */ true) {
+        override fun handleOnBackPressed() {
+          finish()
+        }
+      }
+    )
   }
 
   override fun onOptionsItemSelected(item: MenuItem): Boolean {
     if (item.itemId == android.R.id.home) {
-      @Suppress("DEPRECATION") // TODO(#5404): Migrate to a back pressed dispatcher.
-      onBackPressed()
+      onBackPressedDispatcher.onBackPressed()
     }
     return super.onOptionsItemSelected(item)
   }
diff --git a/app/src/main/java/org/oppia/android/app/devoptions/markstoriescompleted/MarkStoriesCompletedActivity.kt b/app/src/main/java/org/oppia/android/app/devoptions/markstoriescompleted/MarkStoriesCompletedActivity.kt
index e3373fc7df6..86bb96b2f8d 100644
--- a/app/src/main/java/org/oppia/android/app/devoptions/markstoriescompleted/MarkStoriesCompletedActivity.kt
+++ b/app/src/main/java/org/oppia/android/app/devoptions/markstoriescompleted/MarkStoriesCompletedActivity.kt
@@ -4,6 +4,7 @@ import android.content.Context
 import android.content.Intent
 import android.os.Bundle
 import android.view.MenuItem
+import androidx.activity.OnBackPressedCallback
 import org.oppia.android.R
 import org.oppia.android.app.activity.ActivityComponentImpl
 import org.oppia.android.app.activity.InjectableAutoLocalizedAppCompatActivity
@@ -34,12 +35,20 @@ class MarkStoriesCompletedActivity : InjectableAutoLocalizedAppCompatActivity()
     internalProfileId = profileId?.internalId ?: -1
     markStoriesCompletedActivityPresenter.handleOnCreate(internalProfileId)
     title = resourceHandler.getStringInLocale(R.string.mark_stories_completed_activity_title)
+
+    onBackPressedDispatcher.addCallback(
+      this,
+      object : OnBackPressedCallback(/* enabled = */ true) {
+        override fun handleOnBackPressed() {
+          finish()
+        }
+      }
+    )
   }
 
   override fun onOptionsItemSelected(item: MenuItem): Boolean {
     if (item.itemId == android.R.id.home) {
-      @Suppress("DEPRECATION") // TODO(#5404): Migrate to a back pressed dispatcher.
-      onBackPressed()
+      onBackPressedDispatcher.onBackPressed()
     }
     return super.onOptionsItemSelected(item)
   }
diff --git a/app/src/main/java/org/oppia/android/app/devoptions/marktopicscompleted/MarkTopicsCompletedActivity.kt b/app/src/main/java/org/oppia/android/app/devoptions/marktopicscompleted/MarkTopicsCompletedActivity.kt
index a891de3a059..606c4f70bd0 100644
--- a/app/src/main/java/org/oppia/android/app/devoptions/marktopicscompleted/MarkTopicsCompletedActivity.kt
+++ b/app/src/main/java/org/oppia/android/app/devoptions/marktopicscompleted/MarkTopicsCompletedActivity.kt
@@ -4,6 +4,7 @@ import android.content.Context
 import android.content.Intent
 import android.os.Bundle
 import android.view.MenuItem
+import androidx.activity.OnBackPressedCallback
 import org.oppia.android.R
 import org.oppia.android.app.activity.ActivityComponentImpl
 import org.oppia.android.app.activity.InjectableAutoLocalizedAppCompatActivity
@@ -34,12 +35,20 @@ class MarkTopicsCompletedActivity : InjectableAutoLocalizedAppCompatActivity() {
     internalProfileId = profileId?.internalId ?: -1
     markTopicsCompletedActivityPresenter.handleOnCreate(internalProfileId)
     title = resourceHandler.getStringInLocale(R.string.mark_topics_completed_activity_title)
+
+    onBackPressedDispatcher.addCallback(
+      this,
+      object : OnBackPressedCallback(/* enabled = */ true) {
+        override fun handleOnBackPressed() {
+          finish()
+        }
+      }
+    )
   }
 
   override fun onOptionsItemSelected(item: MenuItem): Boolean {
     if (item.itemId == android.R.id.home) {
-      @Suppress("DEPRECATION") // TODO(#5404): Migrate to a back pressed dispatcher.
-      onBackPressed()
+      onBackPressedDispatcher.onBackPressed()
     }
     return super.onOptionsItemSelected(item)
   }
diff --git a/app/src/main/java/org/oppia/android/app/options/ReadingTextSizeActivity.kt b/app/src/main/java/org/oppia/android/app/options/ReadingTextSizeActivity.kt
index e88525841b5..054a4d8e54b 100644
--- a/app/src/main/java/org/oppia/android/app/options/ReadingTextSizeActivity.kt
+++ b/app/src/main/java/org/oppia/android/app/options/ReadingTextSizeActivity.kt
@@ -3,6 +3,7 @@ package org.oppia.android.app.options
 import android.content.Context
 import android.content.Intent
 import android.os.Bundle
+import androidx.activity.OnBackPressedCallback
 import org.oppia.android.app.activity.ActivityComponentImpl
 import org.oppia.android.app.activity.InjectableAutoLocalizedAppCompatActivity
 import org.oppia.android.app.model.ReadingTextSize
@@ -34,6 +35,22 @@ class ReadingTextSizeActivity : InjectableAutoLocalizedAppCompatActivity() {
       savedInstanceState?.retrieveStateBundle()?.selectedReadingTextSize
         ?: retrieveActivityParams().readingTextSize
     readingTextSizeActivityPresenter.handleOnCreate(readingTextSize)
+
+    onBackPressedDispatcher.addCallback(
+      this,
+      object : OnBackPressedCallback(/* enabled = */ true) {
+        override fun handleOnBackPressed() {
+          val resultBundle = ReadingTextSizeActivityResultBundle.newBuilder().apply {
+            selectedReadingTextSize = readingTextSizeActivityPresenter.getSelectedReadingTextSize()
+          }.build()
+          val intent = Intent().apply {
+            putProtoExtra(MESSAGE_READING_TEXT_SIZE_RESULTS_KEY, resultBundle)
+          }
+          setResult(RESULT_OK, intent)
+          finish()
+        }
+      }
+    )
   }
 
   companion object {
@@ -60,17 +77,6 @@ class ReadingTextSizeActivity : InjectableAutoLocalizedAppCompatActivity() {
     outState.putProto(ACTIVITY_SAVED_STATE_KEY, stateBundle)
   }
 
-  override fun onBackPressed() {
-    val resultBundle = ReadingTextSizeActivityResultBundle.newBuilder().apply {
-      selectedReadingTextSize = readingTextSizeActivityPresenter.getSelectedReadingTextSize()
-    }.build()
-    val intent = Intent().apply {
-      putProtoExtra(MESSAGE_READING_TEXT_SIZE_RESULTS_KEY, resultBundle)
-    }
-    setResult(RESULT_OK, intent)
-    finish()
-  }
-
   private fun retrieveActivityParams() =
     intent.getProtoExtra(ACTIVITY_PARAMS_KEY, ReadingTextSizeActivityParams.getDefaultInstance())
 
diff --git a/app/src/main/java/org/oppia/android/app/options/ReadingTextSizeActivityPresenter.kt b/app/src/main/java/org/oppia/android/app/options/ReadingTextSizeActivityPresenter.kt
index 85eedd9d379..491ad80fb11 100644
--- a/app/src/main/java/org/oppia/android/app/options/ReadingTextSizeActivityPresenter.kt
+++ b/app/src/main/java/org/oppia/android/app/options/ReadingTextSizeActivityPresenter.kt
@@ -28,8 +28,7 @@ class ReadingTextSizeActivityPresenter @Inject constructor(
   private fun setToolbar() {
     val readingTextSizeToolbar: Toolbar = activity.findViewById(R.id.reading_text_size_toolbar)
     readingTextSizeToolbar.setNavigationOnClickListener {
-      @Suppress("DEPRECATION") // TODO(#5404): Migrate to a back pressed dispatcher.
-      activity.onBackPressed()
+      activity.onBackPressedDispatcher.onBackPressed()
     }
   }
 
diff --git a/app/src/main/java/org/oppia/android/app/options/ReadingTextSizeFragment.kt b/app/src/main/java/org/oppia/android/app/options/ReadingTextSizeFragment.kt
index 1cdae8c8578..02c9a456e74 100644
--- a/app/src/main/java/org/oppia/android/app/options/ReadingTextSizeFragment.kt
+++ b/app/src/main/java/org/oppia/android/app/options/ReadingTextSizeFragment.kt
@@ -63,7 +63,8 @@ class ReadingTextSizeFragment : InjectableFragment(), TextSizeRadioButtonListene
     readingTextSizeFragmentPresenter.onTextSizeSelected(selectedTextSize)
   }
 
-  private fun retrieveFragmentArguments(): ReadingTextSizeFragmentArguments {
+  /** Returns the [ReadingTextSizeFragmentArguments] stored in the fragment's arguments. */
+  fun retrieveFragmentArguments(): ReadingTextSizeFragmentArguments {
     return checkNotNull(arguments) {
       "Expected arguments to be passed to ReadingTextSizeFragment"
     }.getProto(FRAGMENT_ARGUMENTS_KEY, ReadingTextSizeFragmentArguments.getDefaultInstance())
diff --git a/app/src/main/java/org/oppia/android/app/player/exploration/ExplorationActivity.kt b/app/src/main/java/org/oppia/android/app/player/exploration/ExplorationActivity.kt
index 6912d639ed9..d9519c01e2a 100755
--- a/app/src/main/java/org/oppia/android/app/player/exploration/ExplorationActivity.kt
+++ b/app/src/main/java/org/oppia/android/app/player/exploration/ExplorationActivity.kt
@@ -3,6 +3,7 @@ package org.oppia.android.app.player.exploration
 import android.content.Context
 import android.content.Intent
 import android.os.Bundle
+import androidx.activity.OnBackPressedCallback
 import org.oppia.android.app.activity.ActivityComponentImpl
 import org.oppia.android.app.activity.InjectableAutoLocalizedAppCompatActivity
 import org.oppia.android.app.hintsandsolution.HintsAndSolutionDialogFragment
@@ -48,7 +49,8 @@ class ExplorationActivity :
   BottomSheetOptionsMenuItemClickListener,
   RequestVoiceOverIconSpotlightListener {
 
-  @Inject lateinit var explorationActivityPresenter: ExplorationActivityPresenter
+  @Inject
+  lateinit var explorationActivityPresenter: ExplorationActivityPresenter
   private lateinit var state: State
   private lateinit var writtenTranslationContext: WrittenTranslationContext
 
@@ -67,6 +69,14 @@ class ExplorationActivity :
       params.parentScreen,
       params.isCheckpointingEnabled
     )
+    onBackPressedDispatcher.addCallback(
+      this,
+      object : OnBackPressedCallback(/* enabled = */ true) {
+        override fun handleOnBackPressed() {
+          explorationActivityPresenter.backButtonPressed()
+        }
+      }
+    )
   }
 
   // TODO(#1655): Re-restrict access to fields in tests post-Gradle.
@@ -114,10 +124,6 @@ class ExplorationActivity :
       getProtoExtra(PARAMS_KEY, ExplorationActivityParams.getDefaultInstance())
   }
 
-  override fun onBackPressed() {
-    explorationActivityPresenter.backButtonPressed()
-  }
-
   override fun deleteCurrentProgressAndStopSession(isCompletion: Boolean) {
     explorationActivityPresenter.deleteCurrentProgressAndStopExploration(isCompletion)
   }
diff --git a/app/src/main/java/org/oppia/android/app/player/exploration/ExplorationActivityPresenter.kt b/app/src/main/java/org/oppia/android/app/player/exploration/ExplorationActivityPresenter.kt
index 1c493c19bfa..4049f5dc4a2 100644
--- a/app/src/main/java/org/oppia/android/app/player/exploration/ExplorationActivityPresenter.kt
+++ b/app/src/main/java/org/oppia/android/app/player/exploration/ExplorationActivityPresenter.kt
@@ -113,8 +113,7 @@ class ExplorationActivityPresenter @Inject constructor(
     }
 
     binding.explorationToolbar.setNavigationOnClickListener {
-      @Suppress("DEPRECATION") // TODO(#5404): Migrate to a back pressed dispatcher.
-      activity.onBackPressed()
+      activity.onBackPressedDispatcher.onBackPressed()
     }
 
     binding.actionAudioPlayer.setOnClickListener {
diff --git a/app/src/main/java/org/oppia/android/app/resumelesson/ResumeLessonActivity.kt b/app/src/main/java/org/oppia/android/app/resumelesson/ResumeLessonActivity.kt
index fc63898ac40..4e268b486c2 100644
--- a/app/src/main/java/org/oppia/android/app/resumelesson/ResumeLessonActivity.kt
+++ b/app/src/main/java/org/oppia/android/app/resumelesson/ResumeLessonActivity.kt
@@ -3,6 +3,7 @@ package org.oppia.android.app.resumelesson
 import android.content.Context
 import android.content.Intent
 import android.os.Bundle
+import androidx.activity.OnBackPressedCallback
 import org.oppia.android.app.activity.ActivityComponentImpl
 import org.oppia.android.app.activity.InjectableAutoLocalizedAppCompatActivity
 import org.oppia.android.app.home.RouteToExplorationListener
@@ -41,6 +42,15 @@ class ResumeLessonActivity :
       params.parentScreen,
       params.checkpoint
     )
+    onBackPressedDispatcher.addCallback(
+      this,
+      object : OnBackPressedCallback(/* enabled = */ true) {
+        override fun handleOnBackPressed() {
+          resumeLessonActivityPresenter.setReadingTextSizeNormal()
+          finish()
+        }
+      }
+    )
   }
 
   // TODO(#1655): Re-restrict access to fields in tests post-Gradle.
@@ -113,9 +123,4 @@ class ResumeLessonActivity :
   override fun onDefaultFontSizeLoaded(readingTextSize: ReadingTextSize) {
     resumeLessonActivityPresenter.loadResumeLessonFragment(readingTextSize)
   }
-
-  override fun onBackPressed() {
-    resumeLessonActivityPresenter.setReadingTextSizeNormal()
-    finish()
-  }
 }
diff --git a/app/src/main/java/org/oppia/android/app/resumelesson/ResumeLessonActivityPresenter.kt b/app/src/main/java/org/oppia/android/app/resumelesson/ResumeLessonActivityPresenter.kt
index 210d49c887c..b09e77fdfce 100644
--- a/app/src/main/java/org/oppia/android/app/resumelesson/ResumeLessonActivityPresenter.kt
+++ b/app/src/main/java/org/oppia/android/app/resumelesson/ResumeLessonActivityPresenter.kt
@@ -73,8 +73,7 @@ class ResumeLessonActivityPresenter @Inject constructor(
         context = activity,
         ReadingTextSize.MEDIUM_TEXT_SIZE
       )
-      @Suppress("DEPRECATION") // TODO(#5404): Migrate to a back pressed dispatcher.
-      activity.onBackPressed()
+      activity.onBackPressedDispatcher.onBackPressed()
     }
   }
 
diff --git a/app/src/sharedTest/java/org/oppia/android/app/options/ReadingTextSizeFragmentTest.kt b/app/src/sharedTest/java/org/oppia/android/app/options/ReadingTextSizeFragmentTest.kt
index 5e4b14be4aa..1883d2459bf 100644
--- a/app/src/sharedTest/java/org/oppia/android/app/options/ReadingTextSizeFragmentTest.kt
+++ b/app/src/sharedTest/java/org/oppia/android/app/options/ReadingTextSizeFragmentTest.kt
@@ -16,6 +16,7 @@ import androidx.test.espresso.matcher.ViewMatchers.isChecked
 import androidx.test.espresso.matcher.ViewMatchers.isRoot
 import androidx.test.espresso.matcher.ViewMatchers.withText
 import androidx.test.ext.junit.runners.AndroidJUnit4
+import com.google.common.truth.Truth.assertThat
 import dagger.Component
 import org.hamcrest.Description
 import org.hamcrest.TypeSafeMatcher
@@ -37,6 +38,7 @@ import org.oppia.android.app.application.testing.TestingBuildFlavorModule
 import org.oppia.android.app.devoptions.DeveloperOptionsModule
 import org.oppia.android.app.devoptions.DeveloperOptionsStarterModule
 import org.oppia.android.app.model.ProfileId
+import org.oppia.android.app.model.ReadingTextSize.MEDIUM_TEXT_SIZE
 import org.oppia.android.app.model.ReadingTextSize.SMALL_TEXT_SIZE
 import org.oppia.android.app.player.state.itemviewmodel.SplitScreenInteractionModule
 import org.oppia.android.app.recyclerview.RecyclerViewMatcher.Companion.atPositionOnView
@@ -194,6 +196,47 @@ class ReadingTextSizeFragmentTest {
     }
   }
 
+  @Test
+  fun testFragment_fragmentLoaded_verifyCorrectArgumentsPassed() {
+    launch<ReadingTextSizeActivity>(createReadingTextSizeActivityIntent()).use { scenario ->
+      testCoroutineDispatchers.runCurrent()
+      scenario.onActivity { activity ->
+
+        val readingTextSizeFragment = activity.supportFragmentManager
+          .findFragmentById(R.id.reading_text_size_container) as ReadingTextSizeFragment
+        val receivedReadingTextSize = readingTextSizeFragment.retrieveFragmentArguments()
+          .readingTextSize
+
+        assertThat(receivedReadingTextSize).isEqualTo(SMALL_TEXT_SIZE)
+      }
+    }
+  }
+
+  @Test
+  fun testFragment_saveInstanceState_verifyCorrectStateRestored() {
+    launch<ReadingTextSizeActivity>(createReadingTextSizeActivityIntent()).use { scenario ->
+      testCoroutineDispatchers.runCurrent()
+
+      scenario.onActivity { activity ->
+        val readingTextSizeFragment = activity.supportFragmentManager
+          .findFragmentById(R.id.reading_text_size_container) as ReadingTextSizeFragment
+        readingTextSizeFragment.readingTextSizeFragmentPresenter
+          .onTextSizeSelected(MEDIUM_TEXT_SIZE)
+      }
+
+      scenario.recreate()
+
+      scenario.onActivity { activity ->
+        val newReadingTextSizeFragment = activity.supportFragmentManager
+          .findFragmentById(R.id.reading_text_size_container) as ReadingTextSizeFragment
+        val restoredTopicIdList =
+          newReadingTextSizeFragment.readingTextSizeFragmentPresenter.getTextSizeSelected()
+
+        assertThat(restoredTopicIdList).isEqualTo(MEDIUM_TEXT_SIZE)
+      }
+    }
+  }
+
   private fun createReadingTextSizeActivityIntent() =
     ReadingTextSizeActivity.createReadingTextSizeActivityIntent(context, SMALL_TEXT_SIZE)
 
diff --git a/app/src/sharedTest/java/org/oppia/android/app/resumelesson/ResumeLessonFragmentTest.kt b/app/src/sharedTest/java/org/oppia/android/app/resumelesson/ResumeLessonFragmentTest.kt
index 1a28e628594..33da1eeed36 100644
--- a/app/src/sharedTest/java/org/oppia/android/app/resumelesson/ResumeLessonFragmentTest.kt
+++ b/app/src/sharedTest/java/org/oppia/android/app/resumelesson/ResumeLessonFragmentTest.kt
@@ -41,6 +41,7 @@ import org.oppia.android.app.model.ExplorationActivityParams
 import org.oppia.android.app.model.ExplorationCheckpoint
 import org.oppia.android.app.model.ProfileId
 import org.oppia.android.app.model.ReadingTextSize
+import org.oppia.android.app.model.ResumeLessonFragmentArguments
 import org.oppia.android.app.player.state.itemviewmodel.SplitScreenInteractionModule
 import org.oppia.android.app.shim.ViewBindingShimModule
 import org.oppia.android.app.translation.testing.ActivityRecreatorTestModule
@@ -99,6 +100,7 @@ import org.oppia.android.testing.time.FakeOppiaClockModule
 import org.oppia.android.util.accessibility.AccessibilityTestModule
 import org.oppia.android.util.caching.AssetModule
 import org.oppia.android.util.caching.testing.CachingTestModule
+import org.oppia.android.util.extensions.getProto
 import org.oppia.android.util.gcsresource.GcsResourceModule
 import org.oppia.android.util.locale.LocaleProdModule
 import org.oppia.android.util.logging.EventLoggingConfigurationModule
@@ -273,6 +275,41 @@ class ResumeLessonFragmentTest {
     }
   }
 
+  @Test
+  fun testFragment_fragmentLoaded_verifyCorrectArgumentsPassed() {
+    launch<ResumeLessonActivity>(createResumeLessonActivityIntent()).use { scenario ->
+      testCoroutineDispatchers.runCurrent()
+      scenario.onActivity { activity ->
+
+        val resumeLessonFragment = activity.supportFragmentManager
+          .findFragmentById(R.id.resume_lesson_fragment_placeholder) as ResumeLessonFragment
+        val args = checkNotNull(resumeLessonFragment.arguments) {
+          "Expected arguments to be provided for fragment."
+        }.getProto(
+          ResumeLessonFragment.RESUME_LESSON_FRAGMENT_ARGUMENTS_KEY,
+          ResumeLessonFragmentArguments.getDefaultInstance()
+        )
+        val receivedProfileId = args.profileId
+        val receivedClassroomId = args.classroomId
+        val receivedTopicId = args.topicId
+        val receivedStoryId = args.storyId
+        val receivedExplorationId = args.explorationId
+        val receivedParentScreen = args.parentScreen
+        val receivedCheckpoint = args.checkpoint
+
+        assertThat(receivedProfileId)
+          .isEqualTo(ProfileId.newBuilder().apply { internalId = 1 }.build())
+        assertThat(receivedClassroomId).isEqualTo(TEST_CLASSROOM_ID_1)
+        assertThat(receivedTopicId).isEqualTo(FRACTIONS_TOPIC_ID)
+        assertThat(receivedStoryId).isEqualTo(FRACTIONS_STORY_ID_0)
+        assertThat(receivedExplorationId).isEqualTo(FRACTIONS_EXPLORATION_ID_0)
+        assertThat(receivedParentScreen)
+          .isEqualTo(ExplorationActivityParams.ParentScreen.PARENT_SCREEN_UNSPECIFIED)
+        assertThat(receivedCheckpoint).isEqualTo(ExplorationCheckpoint.getDefaultInstance())
+      }
+    }
+  }
+
   private fun createResumeLessonActivityIntent(): Intent {
     return ResumeLessonActivity.createResumeLessonActivityIntent(
       context,
diff --git a/app/src/sharedTest/java/org/oppia/android/app/settings/profile/ProfileListFragmentTest.kt b/app/src/sharedTest/java/org/oppia/android/app/settings/profile/ProfileListFragmentTest.kt
index 5b7bd78bb3e..742c20bd0f5 100644
--- a/app/src/sharedTest/java/org/oppia/android/app/settings/profile/ProfileListFragmentTest.kt
+++ b/app/src/sharedTest/java/org/oppia/android/app/settings/profile/ProfileListFragmentTest.kt
@@ -18,6 +18,7 @@ import androidx.test.espresso.matcher.ViewMatchers.isRoot
 import androidx.test.espresso.matcher.ViewMatchers.withId
 import androidx.test.espresso.matcher.ViewMatchers.withText
 import androidx.test.ext.junit.runners.AndroidJUnit4
+import com.google.common.truth.Truth.assertThat
 import dagger.Component
 import org.hamcrest.Matchers.not
 import org.junit.After
@@ -37,6 +38,7 @@ import org.oppia.android.app.application.ApplicationStartupListenerModule
 import org.oppia.android.app.application.testing.TestingBuildFlavorModule
 import org.oppia.android.app.devoptions.DeveloperOptionsModule
 import org.oppia.android.app.devoptions.DeveloperOptionsStarterModule
+import org.oppia.android.app.model.ProfileListFragmentArguments
 import org.oppia.android.app.player.state.itemviewmodel.SplitScreenInteractionModule
 import org.oppia.android.app.recyclerview.RecyclerViewMatcher.Companion.atPosition
 import org.oppia.android.app.recyclerview.RecyclerViewMatcher.Companion.atPositionOnView
@@ -86,6 +88,7 @@ import org.oppia.android.testing.time.FakeOppiaClockModule
 import org.oppia.android.util.accessibility.AccessibilityTestModule
 import org.oppia.android.util.caching.AssetModule
 import org.oppia.android.util.caching.testing.CachingTestModule
+import org.oppia.android.util.extensions.getProto
 import org.oppia.android.util.gcsresource.GcsResourceModule
 import org.oppia.android.util.locale.LocaleProdModule
 import org.oppia.android.util.logging.EventLoggingConfigurationModule
@@ -367,6 +370,30 @@ class ProfileListFragmentTest {
     }
   }
 
+  @Test
+  fun testFragment_fragmentLoaded_verifyCorrectArgumentsPassed() {
+    profileTestHelper.initializeProfiles()
+    launch(ProfileListActivity::class.java).use { scenario ->
+      testCoroutineDispatchers.runCurrent()
+      scenario.onActivity { activity ->
+
+        val profileListFragment = activity.supportFragmentManager
+          .findFragmentById(R.id.profile_list_container) as ProfileListFragment
+
+        val arguments = checkNotNull(profileListFragment.arguments) {
+          "Expected variables to be passed to ProfileListFragment"
+        }
+        val args = arguments.getProto(
+          ProfileListFragment.PROFILE_LIST_FRAGMENT_ARGUMENTS_KEY,
+          ProfileListFragmentArguments.getDefaultInstance()
+        )
+        val receivedIsMultipane = args.isMultipane
+
+        assertThat(receivedIsMultipane).isEqualTo(false)
+      }
+    }
+  }
+
   // TODO(#59): Figure out a way to reuse modules instead of needing to re-declare them.
   @Singleton
   @Component(
diff --git a/app/src/sharedTest/java/org/oppia/android/app/settings/profile/ProfileRenameFragmentTest.kt b/app/src/sharedTest/java/org/oppia/android/app/settings/profile/ProfileRenameFragmentTest.kt
index fd4bf50712b..1fc5d9316d3 100644
--- a/app/src/sharedTest/java/org/oppia/android/app/settings/profile/ProfileRenameFragmentTest.kt
+++ b/app/src/sharedTest/java/org/oppia/android/app/settings/profile/ProfileRenameFragmentTest.kt
@@ -21,6 +21,7 @@ import androidx.test.espresso.matcher.ViewMatchers.withId
 import androidx.test.espresso.matcher.ViewMatchers.withText
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import androidx.test.rule.ActivityTestRule
+import com.google.common.truth.Truth.assertThat
 import dagger.Component
 import org.hamcrest.CoreMatchers.not
 import org.hamcrest.core.AllOf.allOf
@@ -102,6 +103,7 @@ import org.oppia.android.util.networking.NetworkConnectionUtilDebugModule
 import org.oppia.android.util.parser.html.HtmlParserEntityTypeModule
 import org.oppia.android.util.parser.image.GlideImageLoaderModule
 import org.oppia.android.util.parser.image.ImageParsingModule
+import org.oppia.android.util.profile.CurrentUserProfileIdIntentDecorator.extractCurrentUserProfileId
 import org.robolectric.annotation.Config
 import org.robolectric.annotation.LooperMode
 import javax.inject.Inject
@@ -441,6 +443,30 @@ class ProfileRenameFragmentTest {
     }
   }
 
+  @Test
+  fun testFragment_fragmentLoaded_verifyCorrectArgumentsPassed() {
+    ActivityScenario.launch<ProfileRenameActivity>(
+      ProfileRenameActivity.createProfileRenameActivity(
+        context = context,
+        internalProfileId = 1
+      )
+    ).use { scenario ->
+      testCoroutineDispatchers.runCurrent()
+      scenario.onActivity { activity ->
+
+        val profileRenameFragment = activity.supportFragmentManager
+          .findFragmentById(R.id.profile_rename_fragment_placeholder) as ProfileRenameFragment
+        val args =
+          checkNotNull(profileRenameFragment.arguments) {
+            "Expected arguments to be passed to ProfileRenameFragment"
+          }
+        val receivedProfileId = args.extractCurrentUserProfileId().internalId
+
+        assertThat(receivedProfileId).isEqualTo(1)
+      }
+    }
+  }
+
   // TODO(#59): Figure out a way to reuse modules instead of needing to re-declare them.
   @Singleton
   @Component(
diff --git a/app/src/sharedTest/java/org/oppia/android/app/settings/profile/ProfileResetPinFragmentTest.kt b/app/src/sharedTest/java/org/oppia/android/app/settings/profile/ProfileResetPinFragmentTest.kt
index c306e9a6206..c0e1541d8a3 100644
--- a/app/src/sharedTest/java/org/oppia/android/app/settings/profile/ProfileResetPinFragmentTest.kt
+++ b/app/src/sharedTest/java/org/oppia/android/app/settings/profile/ProfileResetPinFragmentTest.kt
@@ -22,6 +22,7 @@ import androidx.test.espresso.matcher.ViewMatchers.withId
 import androidx.test.espresso.matcher.ViewMatchers.withText
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import androidx.test.rule.ActivityTestRule
+import com.google.common.truth.Truth.assertThat
 import dagger.Component
 import org.hamcrest.CoreMatchers.allOf
 import org.hamcrest.CoreMatchers.not
@@ -42,6 +43,7 @@ import org.oppia.android.app.application.ApplicationStartupListenerModule
 import org.oppia.android.app.application.testing.TestingBuildFlavorModule
 import org.oppia.android.app.devoptions.DeveloperOptionsModule
 import org.oppia.android.app.devoptions.DeveloperOptionsStarterModule
+import org.oppia.android.app.model.ProfileResetPinFragmentArguments
 import org.oppia.android.app.player.state.itemviewmodel.SplitScreenInteractionModule
 import org.oppia.android.app.shim.ViewBindingShimModule
 import org.oppia.android.app.translation.testing.ActivityRecreatorTestModule
@@ -92,6 +94,7 @@ import org.oppia.android.testing.time.FakeOppiaClockModule
 import org.oppia.android.util.accessibility.AccessibilityTestModule
 import org.oppia.android.util.caching.AssetModule
 import org.oppia.android.util.caching.testing.CachingTestModule
+import org.oppia.android.util.extensions.getProto
 import org.oppia.android.util.gcsresource.GcsResourceModule
 import org.oppia.android.util.locale.LocaleProdModule
 import org.oppia.android.util.logging.EventLoggingConfigurationModule
@@ -1006,6 +1009,70 @@ class ProfileResetPinFragmentTest {
     }
   }
 
+  @Test
+  fun testFragment_fragmentLoaded_verifyCorrectArgumentsPassed() {
+    ActivityScenario.launch<ProfileResetPinActivity>(
+      ProfileResetPinActivity.createProfileResetPinActivity(
+        context = context,
+        profileId = 0,
+        isAdmin = true
+      )
+    ).use { scenario ->
+      testCoroutineDispatchers.runCurrent()
+      scenario.onActivity { activity ->
+
+        val profileResetPinFragment = activity.supportFragmentManager
+          .findFragmentById(R.id.profile_reset_pin_fragment_placeholder) as ProfileResetPinFragment
+
+        val arguments = checkNotNull(profileResetPinFragment.arguments) {
+          "Expected arguments to be passed to ProfileResetPinFragment"
+        }
+        val args =
+          arguments.getProto(
+            ProfileResetPinFragment.PROFILE_RESET_PIN_FRAGMENT_ARGUMENTS_KEY,
+            ProfileResetPinFragmentArguments.getDefaultInstance()
+          )
+        val receivedProfileResetPinProfileId = args.internalProfileId
+        val receivedProfileResetPinIsAdmin = args.isAdmin
+
+        assertThat(receivedProfileResetPinProfileId).isEqualTo(0)
+        assertThat(receivedProfileResetPinIsAdmin).isEqualTo(true)
+      }
+    }
+  }
+
+  @Test
+  fun testFragment_fragmentLoaded_whenIsAdminFalse_verifyCorrectArgumentsPassed() {
+    ActivityScenario.launch<ProfileResetPinActivity>(
+      ProfileResetPinActivity.createProfileResetPinActivity(
+        context = context,
+        profileId = 0,
+        isAdmin = false
+      )
+    ).use { scenario ->
+      testCoroutineDispatchers.runCurrent()
+      scenario.onActivity { activity ->
+
+        val profileResetPinFragment = activity.supportFragmentManager
+          .findFragmentById(R.id.profile_reset_pin_fragment_placeholder) as ProfileResetPinFragment
+
+        val arguments = checkNotNull(profileResetPinFragment.arguments) {
+          "Expected arguments to be passed to ProfileResetPinFragment"
+        }
+        val args =
+          arguments.getProto(
+            ProfileResetPinFragment.PROFILE_RESET_PIN_FRAGMENT_ARGUMENTS_KEY,
+            ProfileResetPinFragmentArguments.getDefaultInstance()
+          )
+        val receivedProfileResetPinProfileId = args.internalProfileId
+        val receivedProfileResetPinIsAdmin = args.isAdmin
+
+        assertThat(receivedProfileResetPinProfileId).isEqualTo(0)
+        assertThat(receivedProfileResetPinIsAdmin).isEqualTo(false)
+      }
+    }
+  }
+
   // TODO(#59): Figure out a way to reuse modules instead of needing to re-declare them.
   @Singleton
   @Component(
diff --git a/app/src/sharedTest/java/org/oppia/android/app/spotlight/SpotlightFragmentTest.kt b/app/src/sharedTest/java/org/oppia/android/app/spotlight/SpotlightFragmentTest.kt
index 1e37adc5e68..9fb017111e3 100644
--- a/app/src/sharedTest/java/org/oppia/android/app/spotlight/SpotlightFragmentTest.kt
+++ b/app/src/sharedTest/java/org/oppia/android/app/spotlight/SpotlightFragmentTest.kt
@@ -14,6 +14,7 @@ import androidx.test.espresso.matcher.ViewMatchers.isDisplayed
 import androidx.test.espresso.matcher.ViewMatchers.withId
 import androidx.test.espresso.matcher.ViewMatchers.withText
 import androidx.test.ext.junit.runners.AndroidJUnit4
+import com.google.common.truth.Truth.assertThat
 import dagger.Component
 import org.junit.After
 import org.junit.Before
@@ -93,6 +94,7 @@ import org.oppia.android.util.networking.NetworkConnectionDebugUtilModule
 import org.oppia.android.util.networking.NetworkConnectionUtilDebugModule
 import org.oppia.android.util.parser.html.HtmlParserEntityTypeModule
 import org.oppia.android.util.parser.image.ImageParsingModule
+import org.oppia.android.util.profile.CurrentUserProfileIdIntentDecorator.extractCurrentUserProfileId
 import org.robolectric.annotation.Config
 import org.robolectric.annotation.LooperMode
 import javax.inject.Inject
@@ -339,6 +341,25 @@ class SpotlightFragmentTest {
     }
   }
 
+  @Test
+  fun testFragment_fragmentLoaded_verifyCorrectArgumentsPassed() {
+    TestPlatformParameterModule.forceEnableSpotlightUi(true)
+    launch<SpotlightFragmentTestActivity>(
+      createSpotlightFragmentTestActivity(context)
+    ).use { scenario ->
+      testCoroutineDispatchers.runCurrent()
+
+      scenario.onActivity { activity ->
+        val spotlightFragment = activity.supportFragmentManager
+          .findFragmentByTag(SpotlightManager.SPOTLIGHT_FRAGMENT_TAG) as SpotlightFragment
+        val receivedInternalProfileId = spotlightFragment
+          .arguments?.extractCurrentUserProfileId()?.internalId ?: -1
+
+        assertThat(receivedInternalProfileId).isEqualTo(0)
+      }
+    }
+  }
+
   private fun setUpTestApplicationComponent() {
     ApplicationProvider.getApplicationContext<TestApplication>().inject(this)
   }
diff --git a/app/src/sharedTest/java/org/oppia/android/app/story/StoryFragmentTest.kt b/app/src/sharedTest/java/org/oppia/android/app/story/StoryFragmentTest.kt
index c93e0f8460a..c8013552937 100644
--- a/app/src/sharedTest/java/org/oppia/android/app/story/StoryFragmentTest.kt
+++ b/app/src/sharedTest/java/org/oppia/android/app/story/StoryFragmentTest.kt
@@ -67,6 +67,7 @@ import org.oppia.android.app.customview.LessonThumbnailImageView
 import org.oppia.android.app.devoptions.DeveloperOptionsModule
 import org.oppia.android.app.devoptions.DeveloperOptionsStarterModule
 import org.oppia.android.app.model.ProfileId
+import org.oppia.android.app.model.StoryFragmentArguments
 import org.oppia.android.app.player.exploration.ExplorationActivity
 import org.oppia.android.app.player.state.itemviewmodel.SplitScreenInteractionModule
 import org.oppia.android.app.recyclerview.RecyclerViewMatcher.Companion.atPosition
@@ -132,6 +133,7 @@ import org.oppia.android.util.accessibility.AccessibilityTestModule
 import org.oppia.android.util.accessibility.FakeAccessibilityService
 import org.oppia.android.util.caching.AssetModule
 import org.oppia.android.util.caching.testing.CachingTestModule
+import org.oppia.android.util.extensions.getProto
 import org.oppia.android.util.gcsresource.GcsResourceModule
 import org.oppia.android.util.locale.LocaleProdModule
 import org.oppia.android.util.logging.EventLoggingConfigurationModule
@@ -144,6 +146,7 @@ import org.oppia.android.util.parser.html.HtmlParserEntityTypeModule
 import org.oppia.android.util.parser.image.ImageLoader
 import org.oppia.android.util.parser.image.ImageParsingModule
 import org.oppia.android.util.parser.image.ImageTransformation
+import org.oppia.android.util.profile.CurrentUserProfileIdIntentDecorator.extractCurrentUserProfileId
 import org.robolectric.annotation.Config
 import org.robolectric.annotation.LooperMode
 import javax.inject.Inject
@@ -772,6 +775,45 @@ class StoryFragmentTest {
     }
   }
 
+  @Test
+  fun testFragment_fragmentLoaded_verifyCorrectArgumentsPassed() {
+    launch<StoryActivity>(createFractionsStoryActivityIntent()).use { scenario ->
+      testCoroutineDispatchers.runCurrent()
+
+      scenario.onActivity { activity ->
+        val storyFragment = activity.supportFragmentManager
+          .findFragmentById(R.id.story_fragment_placeholder) as StoryFragment
+
+        val arguments = checkNotNull(storyFragment.arguments) {
+          "Expected arguments to be passed to StoryFragment."
+        }
+        val args = arguments.getProto(
+          StoryFragment.STORY_FRAGMENT_ARGUMENTS_KEY,
+          StoryFragmentArguments.getDefaultInstance()
+        )
+
+        val receivedInternalProfileId = arguments.extractCurrentUserProfileId().internalId
+        val receivedClassroomId =
+          checkNotNull(args.classroomId) {
+            "Expected classroomId to be passed to StoryFragment."
+          }
+        val receivedTopicId =
+          checkNotNull(args.topicId) {
+            "Expected topicId to be passed to StoryFragment."
+          }
+        val receivedStoryId =
+          checkNotNull(args.storyId) {
+            "Expected storyId to be passed to StoryFragment."
+          }
+
+        assertThat(receivedInternalProfileId).isEqualTo(internalProfileId)
+        assertThat(receivedClassroomId).isEqualTo(TEST_CLASSROOM_ID_1)
+        assertThat(receivedTopicId).isEqualTo(FRACTIONS_TOPIC_ID)
+        assertThat(receivedStoryId).isEqualTo(FRACTIONS_STORY_ID_0)
+      }
+    }
+  }
+
   @Config(qualifiers = "+sw600dp")
   @Test // TODO(#4212): Error -> No views in hierarchy found matching
   fun testStoryFragment_completedChapter_checkProgressDrawableIsCorrect() {
diff --git a/app/src/sharedTest/java/org/oppia/android/app/survey/SurveyFragmentTest.kt b/app/src/sharedTest/java/org/oppia/android/app/survey/SurveyFragmentTest.kt
index b600558c0da..332914c0c7c 100644
--- a/app/src/sharedTest/java/org/oppia/android/app/survey/SurveyFragmentTest.kt
+++ b/app/src/sharedTest/java/org/oppia/android/app/survey/SurveyFragmentTest.kt
@@ -48,6 +48,7 @@ import org.oppia.android.app.devoptions.DeveloperOptionsModule
 import org.oppia.android.app.devoptions.DeveloperOptionsStarterModule
 import org.oppia.android.app.model.ProfileId
 import org.oppia.android.app.model.ScreenName
+import org.oppia.android.app.model.SurveyFragmentArguments
 import org.oppia.android.app.model.SurveyQuestionName
 import org.oppia.android.app.player.state.itemviewmodel.SplitScreenInteractionModule
 import org.oppia.android.app.recyclerview.RecyclerViewMatcher.Companion.atPositionOnView
@@ -101,6 +102,7 @@ import org.oppia.android.testing.time.FakeOppiaClockModule
 import org.oppia.android.util.accessibility.AccessibilityTestModule
 import org.oppia.android.util.caching.AssetModule
 import org.oppia.android.util.caching.testing.CachingTestModule
+import org.oppia.android.util.extensions.getProto
 import org.oppia.android.util.gcsresource.GcsResourceModule
 import org.oppia.android.util.locale.LocaleProdModule
 import org.oppia.android.util.logging.CurrentAppScreenNameIntentDecorator.extractCurrentAppScreenName
@@ -113,6 +115,7 @@ import org.oppia.android.util.networking.NetworkConnectionUtilDebugModule
 import org.oppia.android.util.parser.html.HtmlParserEntityTypeModule
 import org.oppia.android.util.parser.image.GlideImageLoaderModule
 import org.oppia.android.util.parser.image.ImageParsingModule
+import org.oppia.android.util.profile.CurrentUserProfileIdIntentDecorator.extractCurrentUserProfileId
 import org.robolectric.annotation.Config
 import org.robolectric.annotation.LooperMode
 import javax.inject.Inject
@@ -535,6 +538,32 @@ class SurveyFragmentTest {
     }
   }
 
+  @Test
+  fun testFragment_fragmentLoaded_verifyCorrectArgumentsPassed() {
+    launch<SurveyActivity>(
+      createSurveyActivityIntent()
+    ).use { scenario ->
+      testCoroutineDispatchers.runCurrent()
+      scenario.onActivity { activity ->
+
+        val surveyFragment = activity.supportFragmentManager
+          .findFragmentById(R.id.survey_fragment_placeholder) as SurveyFragment
+        val args = surveyFragment.arguments!!.getProto(
+          SurveyFragment.SURVEY_FRAGMENT_ARGUMENTS_KEY,
+          SurveyFragmentArguments.getDefaultInstance()
+        )
+        val receivedInternalProfileId = surveyFragment.arguments!!
+          .extractCurrentUserProfileId().internalId
+        val receivedTopicId = args.topicId!!
+        val receivedExplorationId = args.explorationId!!
+
+        assertThat(receivedInternalProfileId).isEqualTo(0)
+        assertThat(receivedTopicId).isEqualTo(TEST_TOPIC_ID_0)
+        assertThat(receivedExplorationId).isEqualTo(TEST_EXPLORATION_ID_2)
+      }
+    }
+  }
+
   private fun selectNpsAnswerAndMoveToNextQuestion(npsScore: Int) {
     onView(
       allOf(
diff --git a/app/src/sharedTest/java/org/oppia/android/app/thirdparty/ThirdPartyDependencyListFragmentTest.kt b/app/src/sharedTest/java/org/oppia/android/app/thirdparty/ThirdPartyDependencyListFragmentTest.kt
index 89403f4efe2..08c49683c59 100644
--- a/app/src/sharedTest/java/org/oppia/android/app/thirdparty/ThirdPartyDependencyListFragmentTest.kt
+++ b/app/src/sharedTest/java/org/oppia/android/app/thirdparty/ThirdPartyDependencyListFragmentTest.kt
@@ -18,6 +18,7 @@ import androidx.test.espresso.matcher.ViewMatchers.isRoot
 import androidx.test.espresso.matcher.ViewMatchers.withId
 import androidx.test.espresso.matcher.ViewMatchers.withText
 import androidx.test.ext.junit.runners.AndroidJUnit4
+import com.google.common.truth.Truth.assertThat
 import dagger.Component
 import org.hamcrest.Matchers.allOf
 import org.junit.After
@@ -39,6 +40,8 @@ import org.oppia.android.app.devoptions.DeveloperOptionsModule
 import org.oppia.android.app.devoptions.DeveloperOptionsStarterModule
 import org.oppia.android.app.help.thirdparty.LicenseListActivity
 import org.oppia.android.app.help.thirdparty.ThirdPartyDependencyListActivity
+import org.oppia.android.app.help.thirdparty.ThirdPartyDependencyListFragment
+import org.oppia.android.app.model.ThirdPartyDependencyListFragmentArguments
 import org.oppia.android.app.player.state.itemviewmodel.SplitScreenInteractionModule
 import org.oppia.android.app.recyclerview.RecyclerViewMatcher.Companion.atPosition
 import org.oppia.android.app.shim.ViewBindingShimModule
@@ -86,6 +89,7 @@ import org.oppia.android.testing.time.FakeOppiaClockModule
 import org.oppia.android.util.accessibility.AccessibilityTestModule
 import org.oppia.android.util.caching.AssetModule
 import org.oppia.android.util.caching.testing.CachingTestModule
+import org.oppia.android.util.extensions.getProto
 import org.oppia.android.util.gcsresource.GcsResourceModule
 import org.oppia.android.util.locale.LocaleProdModule
 import org.oppia.android.util.logging.EventLoggingConfigurationModule
@@ -447,6 +451,30 @@ class ThirdPartyDependencyListFragmentTest {
     }
   }
 
+  @Test
+  fun testFragment_fragmentLoaded_verifyCorrectArgumentsPassed() {
+    launch(ThirdPartyDependencyListActivity::class.java).use { scenario ->
+      testCoroutineDispatchers.runCurrent()
+      scenario.onActivity { activity ->
+
+        val thirdPartyDependencyListFragment = activity.supportFragmentManager
+          .findFragmentById(R.id.third_party_dependency_list_fragment_placeholder)
+          as ThirdPartyDependencyListFragment
+
+        val arguments = checkNotNull(thirdPartyDependencyListFragment.arguments) {
+          "Expected arguments to be passed to ThirdPartyDependencyListFragment"
+        }
+        val args = arguments.getProto(
+          "ThirdPartyDependencyListFragment.arguments",
+          ThirdPartyDependencyListFragmentArguments.getDefaultInstance()
+        )
+        val receivedIsMultipane = args?.isMultipane ?: false
+
+        assertThat(receivedIsMultipane).isEqualTo(false)
+      }
+    }
+  }
+
   private fun retrieveDependencyName(id: Int): String {
     return ApplicationProvider.getApplicationContext<TestApplication>()
       .resources.getString(id)
diff --git a/app/src/sharedTest/java/org/oppia/android/app/topic/revisioncard/RevisionCardFragmentTest.kt b/app/src/sharedTest/java/org/oppia/android/app/topic/revisioncard/RevisionCardFragmentTest.kt
index 29dde65b725..8be20c6dc55 100644
--- a/app/src/sharedTest/java/org/oppia/android/app/topic/revisioncard/RevisionCardFragmentTest.kt
+++ b/app/src/sharedTest/java/org/oppia/android/app/topic/revisioncard/RevisionCardFragmentTest.kt
@@ -26,6 +26,7 @@ import androidx.test.espresso.matcher.ViewMatchers.isRoot
 import androidx.test.espresso.matcher.ViewMatchers.withId
 import androidx.test.espresso.matcher.ViewMatchers.withText
 import androidx.test.ext.junit.runners.AndroidJUnit4
+import com.google.common.truth.Truth.assertThat
 import dagger.Component
 import dagger.Module
 import dagger.Provides
@@ -58,6 +59,7 @@ import org.oppia.android.app.model.OptionsActivityParams
 import org.oppia.android.app.model.ProfileId
 import org.oppia.android.app.model.ReadingTextSize
 import org.oppia.android.app.model.RevisionCardActivityParams
+import org.oppia.android.app.model.RevisionCardFragmentArguments
 import org.oppia.android.app.model.WrittenTranslationLanguageSelection
 import org.oppia.android.app.options.OptionsActivity
 import org.oppia.android.app.player.exploration.ExplorationActivity
@@ -122,6 +124,7 @@ import org.oppia.android.util.accessibility.AccessibilityTestModule
 import org.oppia.android.util.caching.AssetModule
 import org.oppia.android.util.caching.LoadImagesFromAssets
 import org.oppia.android.util.caching.LoadLessonProtosFromAssets
+import org.oppia.android.util.extensions.getProto
 import org.oppia.android.util.gcsresource.GcsResourceModule
 import org.oppia.android.util.locale.LocaleProdModule
 import org.oppia.android.util.logging.EventLoggingConfigurationModule
@@ -133,6 +136,7 @@ import org.oppia.android.util.networking.NetworkConnectionUtilDebugModule
 import org.oppia.android.util.parser.html.HtmlParserEntityTypeModule
 import org.oppia.android.util.parser.image.GlideImageLoaderModule
 import org.oppia.android.util.parser.image.ImageParsingModule
+import org.oppia.android.util.profile.CurrentUserProfileIdIntentDecorator.extractCurrentUserProfileId
 import org.robolectric.annotation.Config
 import org.robolectric.annotation.LooperMode
 import javax.inject.Inject
@@ -810,6 +814,45 @@ class RevisionCardFragmentTest {
     }
   }
 
+  @Test
+  fun testFragment_fragmentLoaded_verifyCorrectArgumentsPassed() {
+    launch<RevisionCardActivity>(
+      createRevisionCardActivityIntent(
+        context,
+        profileId.internalId,
+        FRACTIONS_TOPIC_ID,
+        subtopicId = 2,
+        FRACTIONS_SUBTOPIC_LIST_SIZE
+      )
+    ).use { scenario ->
+      testCoroutineDispatchers.runCurrent()
+      scenario.onActivity { activity ->
+
+        val revisionCardFragment = activity.supportFragmentManager
+          .findFragmentById(R.id.revision_card_fragment_placeholder) as RevisionCardFragment
+        val arguments = checkNotNull(revisionCardFragment.arguments) {
+          "Expected arguments to be passed to StoryFragment"
+        }
+        val args = arguments.getProto(
+          RevisionCardFragment.REVISION_CARD_FRAGMENT_ARGUMENTS_KEY,
+          RevisionCardFragmentArguments.getDefaultInstance()
+        )
+        val receivedTopicId =
+          checkNotNull(args?.topicId) {
+            "Expected topicId to be passed to RevisionCardFragment"
+          }
+        val receivedSubtopicId = args?.subtopicId ?: -1
+        val receivedProfileId = arguments.extractCurrentUserProfileId()
+        val receivedSubtopicListSize = args?.subtopicListSize ?: -1
+
+        assertThat(receivedTopicId).isEqualTo(FRACTIONS_TOPIC_ID)
+        assertThat(receivedSubtopicId).isEqualTo(2)
+        assertThat(receivedProfileId).isEqualTo(profileId)
+        assertThat(receivedSubtopicListSize).isEqualTo(FRACTIONS_SUBTOPIC_LIST_SIZE)
+      }
+    }
+  }
+
   /** See the version in StateFragmentTest for documentation details. */
   @Suppress("SameParameterValue")
   private fun openClickableSpan(text: String): ViewAction {
diff --git a/domain/src/main/java/org/oppia/android/domain/classroom/ClassroomController.kt b/domain/src/main/java/org/oppia/android/domain/classroom/ClassroomController.kt
index 20cc3ee832e..dc99f75c5ce 100644
--- a/domain/src/main/java/org/oppia/android/domain/classroom/ClassroomController.kt
+++ b/domain/src/main/java/org/oppia/android/domain/classroom/ClassroomController.kt
@@ -72,6 +72,32 @@ class ClassroomController @Inject constructor(
     )
   }
 
+  /**
+   * Returns the list of [ClassroomRecord]s currently available in the app.
+   */
+  fun getClassrooms(): List<ClassroomRecord> {
+    return if (loadLessonProtosFromAssets) {
+      assetRepository.loadProtoFromLocalAssets(
+        assetName = "classrooms",
+        baseMessage = ClassroomIdList.getDefaultInstance()
+      ).classroomIdsList.map { classroomId ->
+        getClassroomById(classroomId)
+      }
+    } else loadClassroomsFromJson()
+  }
+
+  /**
+   * Returns the [ClassroomRecord] associated with the given [classroomId].
+   */
+  fun getClassroomById(classroomId: String): ClassroomRecord {
+    return if (loadLessonProtosFromAssets) {
+      assetRepository.tryLoadProtoFromLocalAssets(
+        assetName = classroomId,
+        defaultMessage = ClassroomRecord.getDefaultInstance()
+      ) ?: ClassroomRecord.getDefaultInstance()
+    } else loadClassroomByIdFromJson(classroomId)
+  }
+
   /**
    * Returns the list of [TopicSummary]s currently tracked by the app, possibly up to
    * [EVICTION_TIME_MILLIS] old.
@@ -90,7 +116,7 @@ class ClassroomController @Inject constructor(
    */
   fun getClassroomIdByTopicId(topicId: String): String {
     var classroomId = ""
-    loadClassrooms().forEach {
+    getClassrooms().forEach {
       if (it.topicPrerequisitesMap.keys.contains(topicId)) {
         classroomId = it.id
       }
@@ -333,17 +359,6 @@ class ClassroomController @Inject constructor(
       .build()
   }
 
-  private fun loadClassrooms(): List<ClassroomRecord> {
-    return if (loadLessonProtosFromAssets) {
-      assetRepository.loadProtoFromLocalAssets(
-        assetName = "classrooms",
-        baseMessage = ClassroomIdList.getDefaultInstance()
-      ).classroomIdsList.map { classroomId ->
-        loadClassroomById(classroomId)
-      }
-    } else loadClassroomsFromJson()
-  }
-
   private fun loadClassroomsFromJson(): List<ClassroomRecord> {
     // Load the classrooms.json file.
     val classroomIdsObj = jsonAssetRetriever.loadJsonFromAsset("classrooms.json")
@@ -359,27 +374,20 @@ class ClassroomController @Inject constructor(
       val classroomId = checkNotNull(classroomIds.optString(i)) {
         "Expected non-null classroom ID at index $i."
       }
-      val classroomRecord = loadClassroomById(classroomId)
+      val classroomRecord = getClassroomById(classroomId)
       classroomRecords.add(classroomRecord)
     }
 
     return classroomRecords
   }
 
-  private fun loadClassroomById(classroomId: String): ClassroomRecord {
-    return if (loadLessonProtosFromAssets) {
-      assetRepository.tryLoadProtoFromLocalAssets(
-        assetName = classroomId,
-        defaultMessage = ClassroomRecord.getDefaultInstance()
-      ) ?: ClassroomRecord.getDefaultInstance()
-    } else loadClassroomByIdFromJson(classroomId)
-  }
-
   private fun loadClassroomByIdFromJson(classroomId: String): ClassroomRecord {
     // Load the classroom obj.
     val classroomObj = jsonAssetRetriever.loadJsonFromAsset("$classroomId.json")
     checkNotNull(classroomObj) { "Failed to load $classroomId.json." }
 
+    val classroomTitle = classroomObj.getJSONObject("classroom_title")
+
     // Load the topic prerequisite map.
     val topicPrereqsObj = checkNotNull(classroomObj.optJSONObject("topic_prerequisites")) {
       "Expected classroom to have non-null topic_prerequisites."
@@ -398,6 +406,10 @@ class ClassroomController @Inject constructor(
       id = checkNotNull(classroomObj.optString("classroom_id")) {
         "Expected classroom to have ID."
       }
+      translatableTitle = SubtitledHtml.newBuilder().apply {
+        contentId = classroomTitle.getStringFromObject("content_id")
+        html = classroomTitle.getStringFromObject("html")
+      }.build()
       putAllTopicPrerequisites(
         topicPrereqs.mapValues { (_, topicIds) ->
           ClassroomRecord.TopicIdList.newBuilder().apply {
diff --git a/domain/src/main/java/org/oppia/android/domain/topic/TopicListController.kt b/domain/src/main/java/org/oppia/android/domain/topic/TopicListController.kt
index 4fa2ed9edef..b82f8f56f0f 100644
--- a/domain/src/main/java/org/oppia/android/domain/topic/TopicListController.kt
+++ b/domain/src/main/java/org/oppia/android/domain/topic/TopicListController.kt
@@ -5,9 +5,7 @@ import org.json.JSONObject
 import org.oppia.android.app.model.ChapterPlayState
 import org.oppia.android.app.model.ChapterProgress
 import org.oppia.android.app.model.ChapterSummary
-import org.oppia.android.app.model.ClassroomIdList
 import org.oppia.android.app.model.ClassroomRecord
-import org.oppia.android.app.model.ClassroomRecord.TopicIdList
 import org.oppia.android.app.model.ComingSoonTopicList
 import org.oppia.android.app.model.EphemeralTopicSummary
 import org.oppia.android.app.model.LessonThumbnail
@@ -29,7 +27,7 @@ import org.oppia.android.app.model.TopicProgress
 import org.oppia.android.app.model.TopicRecord
 import org.oppia.android.app.model.TopicSummary
 import org.oppia.android.app.model.UpcomingTopic
-import org.oppia.android.domain.classroom.TEST_CLASSROOM_ID_0
+import org.oppia.android.domain.classroom.ClassroomController
 import org.oppia.android.domain.translation.TranslationController
 import org.oppia.android.domain.util.JsonAssetRetriever
 import org.oppia.android.domain.util.getStringFromObject
@@ -101,6 +99,7 @@ class TopicListController @Inject constructor(
   private val oppiaClock: OppiaClock,
   private val assetRepository: AssetRepository,
   private val translationController: TranslationController,
+  private val classroomController: ClassroomController,
   @LoadLessonProtosFromAssets private val loadLessonProtosFromAssets: Boolean
 ) {
 
@@ -137,7 +136,7 @@ class TopicListController @Inject constructor(
 
   private fun createTopicList(contentLocale: OppiaLocale.ContentLocale): TopicList {
     return if (loadLessonProtosFromAssets) {
-      val topicIdList = loadCombinedClassroomsTopicIdList()
+      val topicIdList = loadCombinedTopicIdList()
       return TopicList.newBuilder().apply {
         // Only include topics currently playable in the topic list.
         addAllTopicSummary(
@@ -152,7 +151,7 @@ class TopicListController @Inject constructor(
   }
 
   private fun loadTopicListFromJson(contentLocale: OppiaLocale.ContentLocale): TopicList {
-    val topicIdList = loadCombinedClassroomsTopicIdList()
+    val topicIdList = loadCombinedTopicIdList()
     val topicListBuilder = TopicList.newBuilder()
     for (topicId in topicIdList) {
       val ephemeralSummary = createEphemeralTopicSummary(topicId, contentLocale)
@@ -166,7 +165,7 @@ class TopicListController @Inject constructor(
   }
 
   private fun computeComingSoonTopicList(): ComingSoonTopicList {
-    val topicIdList = loadCombinedClassroomsTopicIdList()
+    val topicIdList = loadCombinedTopicIdList()
     val comingSoonTopicListBuilder = ComingSoonTopicList.newBuilder()
     for (topicId in topicIdList) {
       val upcomingTopicSummary = createUpcomingTopicSummary(topicId)
@@ -185,7 +184,7 @@ class TopicListController @Inject constructor(
     contentLocale: OppiaLocale.ContentLocale
   ): EphemeralTopicSummary {
     val topicSummary = createTopicSummary(topicId)
-    val classroomRecord = loadClassroomById(topicSummary.classroomId)
+    val classroomRecord = classroomController.getClassroomById(topicSummary.classroomId)
     return EphemeralTopicSummary.newBuilder().apply {
       this.topicSummary = topicSummary
       writtenTranslationContext =
@@ -217,7 +216,7 @@ class TopicListController @Inject constructor(
         this.topicId = topicId
         putAllWrittenTranslations(topicRecord.writtenTranslationsMap)
         title = topicRecord.translatableTitle
-        classroomId = getClassroomIdByTopicId(topicId)
+        classroomId = classroomController.getClassroomIdByTopicId(topicId)
         totalChapterCount = storyRecords.map { it.chaptersList.size }.sum()
         topicThumbnail = topicRecord.topicThumbnail
         topicPlayAvailability = if (topicRecord.isPublished) {
@@ -259,7 +258,7 @@ class TopicListController @Inject constructor(
       contentId = "title"
       html = jsonObject.getStringFromObject("topic_name")
     }.build()
-    val classroomId = getClassroomIdByTopicId(topicId)
+    val classroomId = classroomController.getClassroomIdByTopicId(topicId)
     // No written translations are included since none are retrieved from JSON.
     return TopicSummary.newBuilder()
       .setTopicId(topicId)
@@ -296,7 +295,7 @@ class TopicListController @Inject constructor(
       html = jsonObject.getStringFromObject("topic_name")
     }.build()
 
-    val classroomId = getClassroomIdByTopicId(topicId)
+    val classroomId = classroomController.getClassroomIdByTopicId(topicId)
 
     val classroomJsonObject = jsonAssetRetriever.loadJsonFromAsset("$classroomId.json")!!
     val classroomTitle = classroomJsonObject.getJSONObject("classroom_title").let {
@@ -369,8 +368,8 @@ class TopicListController @Inject constructor(
     sortedTopicProgressList.forEach { topicProgress ->
       val topic = topicController.retrieveTopic(topicProgress.topicId)
       val classroom = topic?.topicId?.let { topicId ->
-        val classroomId = getClassroomIdByTopicId(topicId)
-        loadClassroomById(classroomId)
+        val classroomId = classroomController.getClassroomIdByTopicId(topicId)
+        classroomController.getClassroomById(classroomId)
       } ?: ClassroomRecord.getDefaultInstance()
       // Ignore topics that are no longer on the device, or that have been unpublished.
       if (topic?.topicPlayAvailability?.availabilityCase == AVAILABLE_TO_PLAY_NOW) {
@@ -556,7 +555,7 @@ class TopicListController @Inject constructor(
    * being suggested.
    */
   private fun retrieveTopicDependencies(topicId: String): List<String> {
-    val classrooms = loadClassrooms()
+    val classrooms = classroomController.getClassrooms()
     for (classroom in classrooms) {
       if (classroom.topicPrerequisitesMap.containsKey(topicId)) {
         return classroom.topicPrerequisitesMap.getValue(topicId).topicIdsList
@@ -589,7 +588,7 @@ class TopicListController @Inject constructor(
     contentLocale: OppiaLocale.ContentLocale
   ): List<PromotedStory> {
     return if (loadLessonProtosFromAssets) {
-      val topicIdList = loadCombinedClassroomsTopicIdList()
+      val topicIdList = loadCombinedTopicIdList()
       return computeSuggestedStoriesForTopicIds(topicProgressList, topicIdList, contentLocale)
     } else computeSuggestedStoriesFromJson(topicProgressList, contentLocale)
   }
@@ -599,7 +598,7 @@ class TopicListController @Inject constructor(
     contentLocale: OppiaLocale.ContentLocale
   ): List<PromotedStory> {
     // All topics that could potentially be recommended.
-    val topicIdList = loadCombinedClassroomsTopicIdList()
+    val topicIdList = loadCombinedTopicIdList()
     return computeSuggestedStoriesForTopicIds(topicProgressList, topicIdList, contentLocale)
   }
 
@@ -713,7 +712,7 @@ class TopicListController @Inject constructor(
         )
       val classroomRecord =
         assetRepository.loadProtoFromLocalAssets(
-          assetName = getClassroomIdByTopicId(topicId),
+          assetName = classroomController.getClassroomIdByTopicId(topicId),
           baseMessage = ClassroomRecord.getDefaultInstance()
         )
       return PromotedStory.newBuilder().apply {
@@ -783,7 +782,7 @@ class TopicListController @Inject constructor(
         }.build()
       } ?: SubtitledHtml.getDefaultInstance()
 
-      val classroomId = getClassroomIdByTopicId(topicId)
+      val classroomId = classroomController.getClassroomIdByTopicId(topicId)
 
       val classroomJson = jsonAssetRetriever.loadJsonFromAsset("$classroomId.json")
       if (classroomJson!!.optString("classroom_title").isNullOrEmpty()) return null
@@ -867,104 +866,8 @@ class TopicListController @Inject constructor(
       .build()
   }
 
-  private fun getClassroomIdByTopicId(topicId: String): String {
-    var classroomId = TEST_CLASSROOM_ID_0
-    loadClassrooms().forEach {
-      if (it.topicPrerequisitesMap.keys.contains(topicId)) {
-        classroomId = it.id
-      }
-    }
-    return classroomId
-  }
-
-  // TODO(#5344): Remove this in favor of per-classroom data handling.
-  private fun loadClassrooms(): List<ClassroomRecord> {
-    return if (loadLessonProtosFromAssets) {
-      assetRepository.loadProtoFromLocalAssets(
-        assetName = "classrooms",
-        baseMessage = ClassroomIdList.getDefaultInstance()
-      ).classroomIdsList.map { classroomId ->
-        loadClassroomById(classroomId)
-      }
-    } else loadClassroomsFromJson()
-  }
-
-  // TODO(#5344): Remove this in favor of per-classroom data handling.
-  private fun loadClassroomsFromJson(): List<ClassroomRecord> {
-    // Load the classrooms.json file.
-    val classroomIdsObj = jsonAssetRetriever.loadJsonFromAsset("classrooms.json")
-    checkNotNull(classroomIdsObj) { "Failed to load classrooms.json." }
-    val classroomIds = classroomIdsObj.optJSONArray("classroom_id_list")
-    checkNotNull(classroomIds) { "classrooms.json is missing classroom IDs." }
-
-    // Initialize a list to store the [ClassroomRecord]s.
-    val classroomRecords = mutableListOf<ClassroomRecord>()
-
-    // Iterate over all classroomIds and load each classroom's JSON.
-    for (i in 0 until classroomIds.length()) {
-      val classroomId = checkNotNull(classroomIds.optString(i)) {
-        "Expected non-null classroom ID at index $i."
-      }
-      val classroomRecord = loadClassroomById(classroomId)
-      classroomRecords.add(classroomRecord)
-    }
-
-    return classroomRecords
-  }
-
-  // TODO(#5344): Move this to classroom controller.
-  private fun loadClassroomById(classroomId: String): ClassroomRecord {
-    return if (loadLessonProtosFromAssets) {
-      assetRepository.tryLoadProtoFromLocalAssets(
-        assetName = classroomId,
-        defaultMessage = ClassroomRecord.getDefaultInstance()
-      ) ?: ClassroomRecord.getDefaultInstance()
-    } else loadClassroomByIdFromJson(classroomId)
-  }
-
-  // TODO(#5344): Remove this in favor of per-classroom data handling.
-  private fun loadClassroomByIdFromJson(classroomId: String): ClassroomRecord {
-    // Load the classroom obj.
-    val classroomObj = jsonAssetRetriever.loadJsonFromAsset("$classroomId.json")
-    checkNotNull(classroomObj) { "Failed to load $classroomId.json." }
-
-    val classroomTitle = classroomObj.getJSONObject("classroom_title")
-
-    // Load the topic prerequisite map.
-    val topicPrereqsObj = checkNotNull(classroomObj.optJSONObject("topic_prerequisites")) {
-      "Expected classroom to have non-null topic_prerequisites."
-    }
-    val topicPrereqs = topicPrereqsObj.keys().asSequence().associateWith { topicId ->
-      val topicIdArray = checkNotNull(topicPrereqsObj.optJSONArray(topicId)) {
-        "Expected topic $topicId to have a non-null string list."
-      }
-      return@associateWith List(topicIdArray.length()) { index ->
-        checkNotNull(topicIdArray.optString(index)) {
-          "Expected topic $topicId to have non-null string at index $index."
-        }
-      }
-    }
-    return ClassroomRecord.newBuilder().apply {
-      id = checkNotNull(classroomObj.optString("classroom_id")) {
-        "Expected classroom to have ID."
-      }
-      translatableTitle = SubtitledHtml.newBuilder().apply {
-        contentId = classroomTitle.getStringFromObject("content_id")
-        html = classroomTitle.getStringFromObject("html")
-      }.build()
-      putAllTopicPrerequisites(
-        topicPrereqs.mapValues { (_, topicIds) ->
-          TopicIdList.newBuilder().apply {
-            addAllTopicIds(topicIds)
-          }.build()
-        }
-      )
-    }.build()
-  }
-
-  // TODO(#5344): Remove this in favor of per-classroom data handling.
-  private fun loadCombinedClassroomsTopicIdList(): List<String> =
-    loadClassrooms().flatMap { it.topicPrerequisitesMap.keys.toList() }
+  private fun loadCombinedTopicIdList(): List<String> =
+    classroomController.getClassrooms().flatMap { it.topicPrerequisitesMap.keys.toList() }
 }
 
 internal fun createTopicThumbnailFromJson(topicJsonObject: JSONObject): LessonThumbnail {
diff --git a/domain/src/test/java/org/oppia/android/domain/classroom/ClassroomControllerTest.kt b/domain/src/test/java/org/oppia/android/domain/classroom/ClassroomControllerTest.kt
index 24129abc307..6c1cee650bf 100644
--- a/domain/src/test/java/org/oppia/android/domain/classroom/ClassroomControllerTest.kt
+++ b/domain/src/test/java/org/oppia/android/domain/classroom/ClassroomControllerTest.kt
@@ -131,6 +131,23 @@ class ClassroomControllerTest {
     assertThat(classroomList.classroomSummaryList.size).isEqualTo(2)
   }
 
+  @Test
+  fun testGetClassrooms_returnsAllClassrooms() {
+    val classrooms = classroomController.getClassrooms()
+
+    assertThat(classrooms[0].id).isEqualTo(TEST_CLASSROOM_ID_0)
+    assertThat(classrooms[1].id).isEqualTo(TEST_CLASSROOM_ID_1)
+    assertThat(classrooms[2].id).isEqualTo(TEST_CLASSROOM_ID_2)
+  }
+
+  @Test
+  fun testGetClassroomById_hasCorrectClassroomInfo() {
+    val classroom = classroomController.getClassroomById(TEST_CLASSROOM_ID_0)
+
+    assertThat(classroom.id).isEqualTo(TEST_CLASSROOM_ID_0)
+    assertThat(classroom.translatableTitle.html).isEqualTo("Science")
+  }
+
   @Test
   fun testRetrieveTopicList_isSuccessful() {
     val topicListProvider = classroomController.getTopicList(profileId0, TEST_CLASSROOM_ID_0)