diff --git a/course/reset_form.php b/course/reset_form.php
index 622909b5667..50616cb4acf 100644
--- a/course/reset_form.php
+++ b/course/reset_form.php
@@ -38,7 +38,9 @@ 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 b4063e9ee56..4607a24d2e8 100644
--- a/lang/en/grades.php
+++ b/lang/en/grades.php
@@ -545,7 +545,9 @@ $string['recovergradesdefault'] = 'Recover grades default';
 $string['recovergradesdefault_help'] = 'By default recover old grades when re-enrolling a user in a course.';
 $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';