If you want to prevent changes to grades for certain grade items (assignments, quizzes, etc.), you can use the Grade locking feature in Moodle. Aside from Moodle not being able to make changes to grades, it would also prevent you from manually overriding the students' grades.


  1. Open the course >> gear icon >> Gradebook setup.
  2. On the Gradebook setup page, click Edit >> Edit settings for the activity you want to lock grades for.

    Note: If you want to lock grade update for all the items in the category, you can go to that Category's Edit settings and enable the Locked option. The setting would cascade down to all the child grade items.

  3. Under Grade item, checkmark Locked and Save changes.

    Note: To prevent grade updates after a certain date/time, click Show more... and enable date.