diff --git a/completion/models.py b/completion/models.py
index 777d469..7cdfe05 100644
--- a/completion/models.py
+++ b/completion/models.py
@@ -14,12 +14,17 @@
 
 from model_utils.models import TimeStampedModel
 
+from eventtracking import tracker
+
 from . import waffle
 
 log = logging.getLogger(__name__)
 User = auth.get_user_model()
 
 
+BLOCK_COMPLETION_CHANGED_EVENT_TYPE = 'edx.completion.block_completion.changed'
+
+
 def validate_percent(value):
     """
     Verify that the passed value is between 0.0 and 1.0.
@@ -126,6 +131,31 @@ def submit_completion(self, user, block_key, completion):
                 "BlockCompletion.objects.submit_completion should not be \
                 called when the feature is disabled."
             )
+        """
+        id = BigAutoField(primary_key=True)  # pylint: disable=invalid-name
+        user = models.ForeignKey(User, on_delete=models.CASCADE)
+        context_key = LearningContextKeyField(max_length=255, db_column="course_key")
+
+        # note: this usage key may not have the run filled in for
+        # old mongo courses.  Use the full_block_key property
+        # instead when you want to use/compare the usage_key.
+        block_key = UsageKeyField(max_length=255)
+        block_type = models.CharField(max_length=64)
+        completion = models.FloatField(validators=[validate_percent])
+        """
+        tracker.emit(
+            str(BLOCK_COMPLETION_CHANGED_EVENT_TYPE),
+            {
+                'user_id': user.id,
+                'course_id': str(block_key.course_key),
+                'context_key': str(context_key),
+                'block_key': str(block_key),
+                'block_type': block_type,
+                'completion': completion,
+                'is_new': is_new,
+            }
+        )
+
         return obj, is_new
 
     @transaction.atomic()