--- gradebook.module	2009-03-07 16:24:20.000000000 +0000
+++ ../../gradebook/gradebook.module	2009-03-27 16:09:50.000000000 +0000
@@ -912,3 +899,8 @@
   return system_settings_form($form);
 }
 
+function gradebook_quiz_finished($quiz,$score) {
+  $grade = gradebookapi_get_grade($quiz->uid, $quiz->nid);
+  $grade->earned = $score['percentage_score'] * $grade->possible / 100.0; 
+  gradebookapi_set_grade($grade);
+}