Index: moodle/mod/lamslesson/mod_form.php
===================================================================
diff -u -rde0123e92410e972ef17ff6f4c252cfa3fc2cd85 -ra733c53bd59dbf3668ce1cd71489b1cced6b3e55
--- moodle/mod/lamslesson/mod_form.php	(.../mod_form.php)	(revision de0123e92410e972ef17ff6f4c252cfa3fc2cd85)
+++ moodle/mod/lamslesson/mod_form.php	(.../mod_form.php)	(revision a733c53bd59dbf3668ce1cd71489b1cced6b3e55)
@@ -214,6 +214,10 @@
 //-------------------------------------------------------------------------------
 	$this->standard_grading_coursemodule_elements();
 
+	// set the default grade to 'No Grade' so it doesn't record
+	// anything on gradebook unless specifically set.
+	$mform->setDefault('grade', 0);
+
         // add standard elements, common to all modules
         $this->standard_coursemodule_elements();
 //-------------------------------------------------------------------------------