diff --git a/Apollo/assets/js/controllers/studentViewCtrl.js b/Apollo/assets/js/controllers/studentViewCtrl.js
index 19b0cdf8..b2447f5e 100755
--- a/Apollo/assets/js/controllers/studentViewCtrl.js
+++ b/Apollo/assets/js/controllers/studentViewCtrl.js
@@ -95,4 +95,22 @@ app.controller('ModalInstanceCtrl', ["$scope", "$modalInstance", "items","WordsS
 
 
 }]);
+app.filter('unique', function() {
+    return function(collection, primaryKey, secondaryKey) { //optional secondary key
+        var output = [],
+            keys = [];
+
+        angular.forEach(collection, function(item) {
+            var key;
+            secondaryKey === undefined ? key = item[primaryKey] : key = item[primaryKey][secondaryKey];
+
+            if(keys.indexOf(key) === -1) {
+                keys.push(key);
+                output.push(item);
+            }
+        });
+
+        return output;
+    };
+});