diff --git a/common/lib/xmodule/xmodule/peer_grading_module.py b/common/lib/xmodule/xmodule/peer_grading_module.py
index cd60e2572c..c2df24dfff 100644
--- a/common/lib/xmodule/xmodule/peer_grading_module.py
+++ b/common/lib/xmodule/xmodule/peer_grading_module.py
@@ -66,7 +66,7 @@ class PeerGradingModule(XModule):
         #We need to set the location here so the child modules can use it
         system.set('location', location)
         self.system = system
-        self.peer_gs = peer_grading_service()
+        self.peer_gs = peer_grading_service(self.system)
 
         self.use_for_single_location = self.metadata.get('use_for_single_location', USE_FOR_SINGLE_LOCATION)
         if isinstance(self.use_for_single_location, basestring):
@@ -106,6 +106,7 @@ class PeerGradingModule(XModule):
         @return:
         """
 
+        log.debug(get)
         handlers = {
             'get_next_submission': self.get_next_submission,
             'show_calibration_essay': self.show_calibration_essay,
@@ -120,8 +121,6 @@ class PeerGradingModule(XModule):
 
         d = handlers[dispatch](get)
 
-        log.debug(d)
-
         return json.dumps(d, cls=ComplexEncoder)
 
     def get_progress(self):
@@ -191,8 +190,10 @@ class PeerGradingModule(XModule):
         score = get['score']
         feedback = get['feedback']
         submission_key = get['submission_key']
-        rubric_scores = get['rubric_scores']
+        rubric_scores = get['rubric_scores[]']
         submission_flagged = get['submission_flagged']
+        log.debug(get)
+        log.debug(rubric_scores)
         try:
             response = self.peer_gs.save_grade(location, grader_id, submission_id,
                 score, feedback, submission_key, rubric_scores, submission_flagged)
@@ -322,7 +323,7 @@ class PeerGradingModule(XModule):
         submission_key = get['submission_key']
         score = get['score']
         feedback = get['feedback']
-        rubric_scores = get['rubric_scores']
+        rubric_scores = get['rubric_scores[]']
 
         try:
             response = self.peer_gs.save_calibration_essay(location, grader_id, calibration_essay_id,
@@ -343,7 +344,7 @@ class PeerGradingModule(XModule):
         problem_list = []
         try:
             problem_list_json = self.peer_gs.get_problem_list(self.system.course_id, self.system.anonymous_student_id)
-            problem_list_dict = json.loads(problem_list_json)
+            problem_list_dict = problem_list_json
             success = problem_list_dict['success']
             if 'error' in problem_list_dict:
                 error_text = problem_list_dict['error']
diff --git a/common/lib/xmodule/xmodule/peer_grading_service.py b/common/lib/xmodule/xmodule/peer_grading_service.py
index 3328a2c3cc..06fa7351cd 100644
--- a/common/lib/xmodule/xmodule/peer_grading_service.py
+++ b/common/lib/xmodule/xmodule/peer_grading_service.py
@@ -19,7 +19,7 @@ class PeerGradingService():
     """
     Interface with the grading controller for peer grading
     """
-    def __init__(self, config):
+    def __init__(self, config, system):
         self.username = config['username']
         self.password = config['password']
         self.url = config['url']
@@ -32,6 +32,7 @@ class PeerGradingService():
         self.save_calibration_essay_url = self.url + '/save_calibration_essay/'
         self.get_problem_list_url = self.url + '/get_problem_list/'
         self.get_notifications_url = self.url + '/get_notifications/'
+        self.system = system
 
     def get_next_submission(self, problem_location, grader_id):
         response = self.get(self.get_next_submission_url,
@@ -48,7 +49,6 @@ class PeerGradingService():
                 'rubric_scores': rubric_scores,
                 'rubric_scores_complete': True,
                 'submission_flagged' : submission_flagged}
-        log.debug(data)
         return self.post(self.save_grade_url, data)
 
     def is_student_calibrated(self, problem_location, grader_id):
@@ -70,7 +70,6 @@ class PeerGradingService():
                 'feedback': feedback,
                 'rubric_scores[]': rubric_scores,
                 'rubric_scores_complete': True}
-        log.debug(data)
         return self.post(self.save_calibration_essay_url, data)
 
     def get_problem_list(self, course_id, grader_id):
@@ -123,7 +122,6 @@ class PeerGradingService():
         """
         Make a get request to the grading controller
         """
-        log.debug(params)
         op = lambda: self.session.get(url,
             allow_redirects=allow_redirects,
             params=params)
@@ -240,7 +238,7 @@ class MockPeerGradingService(object):
                            ]})
 
 _service = None
-def peer_grading_service():
+def peer_grading_service(system):
     """
     Return a peer grading service instance--if settings.MOCK_PEER_GRADING is True,
     returns a mock one, otherwise a real one.
@@ -255,6 +253,6 @@ def peer_grading_service():
     if settings.MOCK_PEER_GRADING:
         _service = MockPeerGradingService()
     else:
-        _service = PeerGradingService(settings.PEER_GRADING_INTERFACE)
+        _service = PeerGradingService(settings.PEER_GRADING_INTERFACE, system)
 
     return _service