diff --git a/js/components/DataManagement/DataManagement.react.tsx b/js/components/DataManagement/DataManagement.react.tsx
index 2cba370..6dda324 100644
--- a/js/components/DataManagement/DataManagement.react.tsx
+++ b/js/components/DataManagement/DataManagement.react.tsx
@@ -1,22 +1,30 @@
-import React from 'react';
+import React, { useState } from 'react';
 import {
   View,
   Text,
   StyleSheet,
   TouchableNativeFeedback,
   Alert,
+  Modal,
+  TextInput,
+  Button,
 } from 'react-native';
 import {ScrollView} from 'react-native-gesture-handler';
 import useStatusBarStyle from '../../hooks/useStatusBarStyle';
 import CourseData from '../../course-data';
 import DownloadManager from '../../download-manager';
-import {genDeleteProgressForCourse} from '../../persistence';
+import {genDeleteProgressForCourse, genSetProgressForCourse} from '../../persistence';
 import {log} from '../../metrics';
 import { useNavigation } from '@react-navigation/core';
 import { MainNavigationProp } from '../App.react';
 
 const DataManagement = ({route}: {route: any}) => {
   useStatusBarStyle('white', 'dark-content');
+  const [modalVisible, setModalVisible] = useState(false);
+  const [lastLessonNumber, _setLastLessonNumber] = useState('');
+  const setLastLessonNumber = (val: string) => {
+    _setLastLessonNumber(val.replace(/[^0-9]/g, ''));
+  };
   const {navigate} = useNavigation<MainNavigationProp<'Data Management'>>();
 
   const {course} = route.params;
@@ -66,6 +74,89 @@ const DataManagement = ({route}: {route: any}) => {
           </TouchableNativeFeedback>
         </View>
 
+        <View style={styles.button}>
+          <TouchableNativeFeedback
+            onPress={async () => setModalVisible(true)}
+            // TODO: Replace with modal with number input and guide text. Added this for testing purposes.
+            useForeground={true}>
+            <View style={styles.buttonInner}>
+              <Text style={styles.buttonTextHeader}>
+                Set {courseTitle} progress
+              </Text>
+              <Text style={styles.buttonText}>
+                This will set all the lessons up to the given lesson number as
+                completed.
+              </Text>
+            </View>
+          </TouchableNativeFeedback>
+          <Modal
+            animationType="fade"
+            transparent={true}
+            visible={modalVisible}
+            onRequestClose={() => {
+              Alert.alert('Modal has been closed.');
+              setModalVisible(!modalVisible);
+              // TODO: How do I do this better? I don't need the value of the input after the modal is closed so it can be discarded. A local variable would suffice.
+              setLastLessonNumber('');
+            }}>
+            <View style={styles.centeredView}>
+              <View style={styles.modalView}>
+                <Text style={styles.modalText}>
+                  Set the lesson number you wish to set your course progress to:
+                </Text>
+                <TextInput
+                  style={styles.input}
+                  onChangeText={setLastLessonNumber}
+                  value={lastLessonNumber}
+                  placeholder="Lesson number"
+                  keyboardType="numeric"
+                />
+                <View>
+                  <View>
+                    <View style={styles.modalMargin}>
+                      <Button
+                        title="Cancel"
+                        onPress={() => {
+                          setModalVisible(!modalVisible);
+                          // TODO: How do I do this better? I don't need the value of the input after the modal is closed so it can be discarded. A local variable would suffice.
+                          setLastLessonNumber('');
+                        }}
+                      />
+                    </View>
+                    <View>
+                      <Button
+                        disabled={!lastLessonNumber}
+                        title="Set progress"
+                        onPress={async () => {
+                          const result = await genSetProgressForCourse(
+                            course,
+                            parseInt(lastLessonNumber, 10),
+                          );
+
+                          if (!result.hasPassed) {
+                            Alert.alert(
+                              'Error',
+                              `Please enter a valid lesson number. The ${courseTitle} course consists of ${result.lessonCount} lessons.`,
+                            );
+                          } else {
+                            Alert.alert(
+                              'Success',
+                              `The last completed lesson for this course is now set to lesson number ${lastLessonNumber}.`,
+                            );
+                          }
+                          setModalVisible(!modalVisible);
+                          // TODO: How do I do this better? I don't need the value of the input after the modal is closed so it can be discarded. A local variable would suffice.
+                          setLastLessonNumber('');
+                        }}
+                      />
+                    </View>
+                  </View>
+                </View>
+              </View>
+            </View>
+          </Modal>
+        </View>
+
         <View style={styles.button}>
           <TouchableNativeFeedback
             onPress={async () => {
@@ -274,6 +365,42 @@ const styles = StyleSheet.create({
   buttonText: {
     fontSize: 16,
   },
+  centeredView: {
+    flex: 1,
+    justifyContent: 'center',
+    alignItems: 'center',
+    marginTop: 22,
+    backgroundColor: 'rgba(0, 0, 0, 0.55)',
+  },
+  modalView: {
+    margin: 20,
+    backgroundColor: 'white',
+    borderRadius: 20,
+    padding: 35,
+    alignItems: 'center',
+    shadowColor: '#000',
+    shadowOffset: {
+      width: 0,
+      height: 2,
+    },
+    shadowOpacity: 0.25,
+    shadowRadius: 4,
+    elevation: 5,
+  },
+  input: {
+    height: 40,
+    margin: 12,
+    borderWidth: 1,
+    padding: 10,
+    textAlign: 'center',
+  },
+  modalText: {
+    marginBottom: 15,
+    textAlign: 'center',
+  },
+  modalMargin: {
+    marginBottom: 15,
+  },
 });
 
 export default DataManagement;
diff --git a/js/components/Listen/ListenBody.react.tsx b/js/components/Listen/ListenBody.react.tsx
index b28cf6d..10fd65e 100644
--- a/js/components/Listen/ListenBody.react.tsx
+++ b/js/components/Listen/ListenBody.react.tsx
@@ -18,6 +18,7 @@ import TrackPlayer, {
 } from 'react-native-track-player';
 import {log} from '../../metrics';
 import useIsLessonDownloaded from '../../hooks/useIsLessonDownloaded';
+import useIsLessonFinished from '../../hooks/useIsLessonFinished';
 
 interface Props {
   course: Course,
@@ -38,6 +39,7 @@ const ListenBody = ({course, lesson, setBottomSheetOpen, skipBack, seekTo, toggl
   const paused = playbackState === State.Paused;
   const bottomSheet = useRef<RBSheet | null>(null);
 
+  const finished = useIsLessonFinished(course, lesson);
   const downloaded = useIsLessonDownloaded(course, lesson);
   if (downloaded === null) {
     return (
@@ -151,7 +153,7 @@ const ListenBody = ({course, lesson, setBottomSheetOpen, skipBack, seekTo, toggl
           });
           setBottomSheetOpen(false);
         }}>
-        <ListenBottomSheet course={course} lesson={lesson} downloaded={downloaded} />
+        <ListenBottomSheet course={course} lesson={lesson} downloaded={downloaded} finished={finished} />
       </RBSheet>
     </>
   );
diff --git a/js/components/Listen/ListenBottomSheet.react.tsx b/js/components/Listen/ListenBottomSheet.react.tsx
index 58396a6..aba060c 100644
--- a/js/components/Listen/ListenBottomSheet.react.tsx
+++ b/js/components/Listen/ListenBottomSheet.react.tsx
@@ -9,7 +9,7 @@ import {
 import {Icon} from 'react-native-elements';
 import CourseData from '../../course-data';
 import DownloadManager from '../../download-manager';
-import {genMarkLessonFinished} from '../../persistence';
+import {genMarkLessonFinished, genToggleLessonFinished} from '../../persistence';
 import {genStopPlaying} from '../../audio-service';
 import {useNavigation} from '@react-navigation/native';
 import {useProgress} from 'react-native-track-player';
@@ -20,10 +20,11 @@ import { MainNavigationProp } from '../App.react';
 interface Props {
   course: Course,
   lesson: number,
-  downloaded: boolean | null;
+  downloaded: boolean | null,
+  finished: boolean | null;
 }
 
-const ListenBottomSheet = ({course, lesson, downloaded}: Props) => {
+const ListenBottomSheet = ({course, lesson, downloaded, finished}: Props) => {
   const {position} = useProgress();
   const {pop} = useNavigation<MainNavigationProp<'Listen'>>();
 
@@ -39,11 +40,13 @@ const ListenBottomSheet = ({course, lesson, downloaded}: Props) => {
             position,
           });
 
-          await genMarkLessonFinished(course, lesson);
+          await genToggleLessonFinished(course, lesson);
           pop();
         }}>
         <View style={styles.bottomSheetRow}>
-          <Text style={styles.rowText}>Mark as finished</Text>
+          <Text style={styles.rowText}>
+            Mark as {finished ? 'unfinished' : 'finished'}
+          </Text>
           <View style={styles.iconContainer}>
             <Icon
               style={styles.rowIcon}
diff --git a/js/hooks/useIsLessonFinished.ts b/js/hooks/useIsLessonFinished.ts
new file mode 100644
index 0000000..99de59a
--- /dev/null
+++ b/js/hooks/useIsLessonFinished.ts
@@ -0,0 +1,17 @@
+import {useState, useEffect} from 'react';
+import {genProgressForLesson} from '../persistence';
+
+export default function useIsLessonFinished(course: Course, lesson: number) {
+  const [finished, setFinished] = useState<boolean | null>(null);
+  useEffect(() => {
+    async function checkIfFinished() {
+      const resp = await genProgressForLesson(course, lesson);
+      setFinished(resp?.finished || null);
+    }
+
+    setFinished(null);
+    checkIfFinished();
+  }, [course, lesson]);
+
+  return finished;
+}
diff --git a/js/persistence.ts b/js/persistence.ts
index 252670e..77ab52e 100644
--- a/js/persistence.ts
+++ b/js/persistence.ts
@@ -121,6 +121,85 @@ export const genMarkLessonFinished = async (
   }
 };
 
+export const genToggleLessonFinished = async (
+  course: Course,
+  lesson: number,
+): Promise<void> => {
+  const progressObject = await genProgressForLesson(course, lesson);
+
+  await Promise.all([
+    AsyncStorage.setItem(
+      `@activity/${course}/${lesson}`,
+      JSON.stringify({
+        ...progressObject,
+        finished: !progressObject?.finished,
+      }),
+    ),
+    AsyncStorage.setItem(
+      `@activity/${course}/most-recent-lesson`,
+      lesson.toString(),
+    ),
+    AsyncStorage.setItem('@activity/most-recent-course', course),
+  ]);
+
+  if (
+    progressObject?.finished &&
+    (await genPreferenceAutoDeleteFinished()) &&
+    (await DownloadManager.genIsDownloaded(course, lesson))
+  ) {
+    await DownloadManager.genDeleteDownload(course, lesson);
+  }
+};
+
+// TODO: Add return value in case user enters out of range lastLesson.
+export const genSetProgressForCourse = async (
+  course: Course,
+  lastLesson: number,
+): Promise<{hasPassed: boolean; lessonCount: number}> => {
+  const lastLessonIndex = lastLesson - 1;
+  const lessonCount = parseInt(CourseData.getFallbackLessonCount(course), 10);
+
+  if (lastLessonIndex >= lessonCount) {
+    return {hasPassed: false, lessonCount};
+  }
+
+  for (let lesson = 0; lesson <= lastLessonIndex; lesson++) {
+    const progressObject = await genProgressForLesson(course, lesson);
+
+    await AsyncStorage.setItem(
+      `@activity/${course}/${lesson}`,
+      JSON.stringify({
+        ...progressObject,
+        finished: true,
+      }),
+    );
+  }
+
+  await Promise.all([
+    AsyncStorage.setItem(
+      `@activity/${course}/most-recent-lesson`,
+      lastLessonIndex.toString(),
+    ),
+    AsyncStorage.setItem('@activity/most-recent-course', course),
+  ]);
+
+  if (lastLessonIndex < lessonCount) {
+    for (let lesson = lastLessonIndex + 1; lesson < lessonCount; lesson++) {
+      const progressObject = await genProgressForLesson(course, lesson);
+
+      await AsyncStorage.setItem(
+        `@activity/${course}/${lesson}`,
+        JSON.stringify({
+          ...progressObject,
+          finished: false,
+        }),
+      );
+    }
+  }
+
+  return {hasPassed: true, lessonCount};
+};
+
 export const genDeleteProgressForCourse = async (
   course: Course,
 ): Promise<void> => {