diff --git a/mod/assignment/lib.php b/mod/assignment/lib.php
index e549d6577bc..f067aabfa75 100644
--- a/mod/assignment/lib.php
+++ b/mod/assignment/lib.php
@@ -217,6 +217,12 @@ function assignment_print_recent_activity(&$logs, $isteacher=false) {
     return $content;
 }
 
+function assignment_grades($assignmentid) {
+/// Must return an array of grades, indexed by user.  The grade is called "grade".
+
+    return get_records("assignment_submissions", "assignment", $assignmentid, "user ASC", "user,grade");
+}
+
 //////////////////////////////////////////////////////////////////////////////////////
 
 function assignment_file_area_name($assignment, $user) {
diff --git a/mod/quiz/lib.php b/mod/quiz/lib.php
index 86eebf16d7f..454389939f6 100644
--- a/mod/quiz/lib.php
+++ b/mod/quiz/lib.php
@@ -185,6 +185,11 @@ function quiz_cron () {
     return true;
 }
 
+function quiz_grades($quizid) {
+/// Must return an array of grades, indexed by user.  The grade is called "grade".
+    return get_records("quiz_grades", "quiz", $quizid, "user ASC", "user,grade");
+}
+
 
 //////////////////////////////////////////////////////////////////////////////////////
 /// Any other quiz functions go here.  Each of them must have a name that