diff --git a/openassessment/xblock/apis/assessments/peer_assessment_api.py b/openassessment/xblock/apis/assessments/peer_assessment_api.py
index 85010c3f06..e628f47933 100644
--- a/openassessment/xblock/apis/assessments/peer_assessment_api.py
+++ b/openassessment/xblock/apis/assessments/peer_assessment_api.py
@@ -1,3 +1,6 @@
+"""
+External API for ORA Peer Assessment data
+"""
 import logging
 
 from openassessment.assessment.errors import PeerAssessmentWorkflowError
diff --git a/openassessment/xblock/apis/assessments/self_assessment_api.py b/openassessment/xblock/apis/assessments/self_assessment_api.py
index 8a203d7331..6764b10d97 100644
--- a/openassessment/xblock/apis/assessments/self_assessment_api.py
+++ b/openassessment/xblock/apis/assessments/self_assessment_api.py
@@ -1,3 +1,6 @@
+"""
+External API for ORA Self Assessment data
+"""
 from submissions import api as submission_api
 
 from openassessment.assessment.api import self as self_api
diff --git a/openassessment/xblock/apis/assessments/staff_assessment_api.py b/openassessment/xblock/apis/assessments/staff_assessment_api.py
index 2fe0a9d913..f1c1c4ec99 100644
--- a/openassessment/xblock/apis/assessments/staff_assessment_api.py
+++ b/openassessment/xblock/apis/assessments/staff_assessment_api.py
@@ -1,3 +1,6 @@
+"""
+External API for ORA Staff Assessment data
+"""
 from submissions import team_api as team_sub_api
 
 from openassessment.assessment.api import staff as staff_api, teams as teams_api
diff --git a/openassessment/xblock/apis/assessments/student_training_api.py b/openassessment/xblock/apis/assessments/student_training_api.py
index bd562ddd0b..a850cbdc9a 100644
--- a/openassessment/xblock/apis/assessments/student_training_api.py
+++ b/openassessment/xblock/apis/assessments/student_training_api.py
@@ -1,3 +1,6 @@
+"""
+External API for ORA Student Training data
+"""
 from openassessment.assessment.api.student_training import (
     get_num_completed,
     get_training_example,