diff --git a/lms/djangoapps/course_home_api/outline/v1/views.py b/lms/djangoapps/course_home_api/outline/v1/views.py
index 7bbb48530e..5f90f99b67 100644
--- a/lms/djangoapps/course_home_api/outline/v1/views.py
+++ b/lms/djangoapps/course_home_api/outline/v1/views.py
@@ -83,7 +83,7 @@ class OutlineTabView(RetrieveAPIView):
             expiration_date: (str) When the access expires, in ISO 8601 notation
             masquerading_expired_course: (bool) Whether this course is expired for the masqueraded user
             upgrade_deadline: (str) Last chance to upgrade, in ISO 8601 notation (or None if can't upgrade anymore)
-            upgrade_url: (str) Upgrade linke (or None if can't upgrade anymore)
+            upgrade_url: (str) Upgrade link (or None if can't upgrade anymore)
         course_blocks:
             blocks: List of serialized Course Block objects. Each serialization has the following fields:
                 id: (str) The usage ID of the block.
diff --git a/lms/djangoapps/course_home_api/progress/v1/serializers.py b/lms/djangoapps/course_home_api/progress/v1/serializers.py
index 3ba2934926..6ad65767cc 100644
--- a/lms/djangoapps/course_home_api/progress/v1/serializers.py
+++ b/lms/djangoapps/course_home_api/progress/v1/serializers.py
@@ -21,6 +21,7 @@ class SubsectionScoresSerializer(serializers.Serializer):
     """
     assignment_type = serializers.CharField(source='format')
     display_name = serializers.CharField()
+    block_key = serializers.SerializerMethodField()
     has_graded_assignment = serializers.BooleanField(source='graded')
     num_points_earned = serializers.IntegerField(source='graded_total.earned')
     num_points_possible = serializers.IntegerField(source='graded_total.possible')
@@ -29,6 +30,9 @@ class SubsectionScoresSerializer(serializers.Serializer):
     show_grades = serializers.SerializerMethodField()
     url = serializers.SerializerMethodField()
 
+    def get_block_key(self, subsection):
+        return str(subsection.location)
+
     def get_url(self, subsection):
         relative_path = reverse('jump_to', args=[self.context['course_key'], subsection.location])
         request = self.context['request']
diff --git a/lms/djangoapps/course_home_api/progress/v1/views.py b/lms/djangoapps/course_home_api/progress/v1/views.py
index 3b099defb7..db8f7649f2 100644
--- a/lms/djangoapps/course_home_api/progress/v1/views.py
+++ b/lms/djangoapps/course_home_api/progress/v1/views.py
@@ -66,6 +66,7 @@ class ProgressTabView(RetrieveAPIView):
             display_name: (str) a str of what the name of the Chapter is for displaying on the site
             subsections: List of serialized Subsections, each has the following fields:
                 assignment_type: (str) the format, if any, of the Subsection (Homework, Exam, etc)
+                block_key: (str) the key of the given subsection block
                 display_name: (str) a str of what the name of the Subsection is for displaying on the site
                 has_graded_assignment: (bool) whether or not the Subsection is a graded assignment
                 num_points_earned: (int) the amount of points the user has earned for the given subsection