diff --git a/course/reset_form.php b/course/reset_form.php
index 52ba8fa4cdc02..1662307f1d2f5 100644
--- a/course/reset_form.php
+++ b/course/reset_form.php
@@ -65,7 +65,9 @@ function definition (){
         $mform->addElement('header', 'gradebookheader', get_string('gradebook', 'grades'));
 
         $mform->addElement('checkbox', 'reset_gradebook_items', get_string('removeallcourseitems', 'grades'));
+        $mform->addHelpButton('reset_gradebook_items', 'removeallcourseitems', 'grades');
         $mform->addElement('checkbox', 'reset_gradebook_grades', get_string('removeallcoursegrades', 'grades'));
+        $mform->addHelpButton('reset_gradebook_grades', 'removeallcoursegrades', 'grades');
         $mform->disabledIf('reset_gradebook_grades', 'reset_gradebook_items', 'checked');
 
 
diff --git a/lang/en/grades.php b/lang/en/grades.php
index ce64984cc534f..3f1ef72672d3d 100644
--- a/lang/en/grades.php
+++ b/lang/en/grades.php
@@ -570,7 +570,9 @@
 $string['refreshpreview'] = 'Refresh preview';
 $string['regradeanyway'] = 'Regrade anyway';
 $string['removeallcoursegrades'] = 'Delete all grades';
+$string['removeallcoursegrades_help'] = 'If ticked, all grade items which were manually added to the gradebook will be deleted, together with grades and data on overridden, excluded, hidden and locked grades. Only grade items associated with activities will remain.';
 $string['removeallcourseitems'] = 'Delete all items and categories';
+$string['removeallcourseitems_help'] = 'If ticked, all categories and grade items which were manually added to the gradebook will be deleted, together with grades and data on overridden, excluded, hidden and locked grades. Only grade items associated with activities will remain.';
 $string['report'] = 'Report';
 $string['reportdefault'] = 'Report default ({$a})';
 $string['reportplugins'] = 'Report plugins';