diff --git a/course/reset_form.php b/course/reset_form.php
index 52ba8fa4cdc..1662307f1d2 100644
--- a/course/reset_form.php
+++ b/course/reset_form.php
@@ -65,7 +65,9 @@ class course_reset_form extends moodleform {
         $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 0e9438c9559..1ec79b87917 100644
--- a/lang/en/grades.php
+++ b/lang/en/grades.php
@@ -570,7 +570,9 @@ $string['recovergradesdefault_help'] = 'By default recover old grades when re-en
 $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';