diff --git a/common/lib/xmodule/xmodule/tests/test_word_cloud.py b/common/lib/xmodule/xmodule/tests/test_word_cloud.py
index e0f59941cb..36656492a6 100644
--- a/common/lib/xmodule/xmodule/tests/test_word_cloud.py
+++ b/common/lib/xmodule/xmodule/tests/test_word_cloud.py
@@ -38,15 +38,14 @@ class WordCloudModuleTest(LogicTest):
             response['student_words'],
             {'sun': 1, 'dog': 6, 'cat': 12}
         )
+
         self.assertListEqual(
             response['top_words'],
-            [{'text': 'dad', 'size': 2, 'percent': 9.0},
-             {'text': 'sun', 'size': 1, 'percent': 5.0},
+            [{'text': 'cat', 'size': 12, 'percent': 55.0},
+             {'text': 'dad', 'size': 2, 'percent': 9.0},
              {'text': 'dog', 'size': 6, 'percent': 27.0},
              {'text': 'mom', 'size': 1, 'percent': 5.0},
-             {'text': 'cat', 'size': 12, 'percent': 54.0}]
+             {'text': 'sun', 'size': 1, 'percent': 4.0}]
         )
 
-        self.assertEqual(
-            100.0,
-            sum(i['percent'] for i in response['top_words']))
+        self.assertEqual(100.0, sum(i['percent'] for i in response['top_words']))
diff --git a/common/lib/xmodule/xmodule/word_cloud_module.py b/common/lib/xmodule/xmodule/word_cloud_module.py
index f3a8011062..e6ca4f53a4 100644
--- a/common/lib/xmodule/xmodule/word_cloud_module.py
+++ b/common/lib/xmodule/xmodule/word_cloud_module.py
@@ -148,11 +148,12 @@ class WordCloudModule(WordCloudFields, XModule):
         """
         list_to_return = []
         percents = 0
-        for num, word_tuple in enumerate(six.iteritems(top_words)):
+        sorted_top_words = sorted(top_words.items(), key=lambda x: x[0].lower())
+        for num, word_tuple in enumerate(sorted_top_words):
             if num == len(top_words) - 1:
                 percent = 100 - percents
             else:
-                percent = round(100.0 * word_tuple[1] / total_count)
+                percent = round((100.0 * word_tuple[1]) / total_count)
                 percents += percent
             list_to_return.append(
                 {