How does one lock the gradebook for certain activities?
Let us say (this just happened in a course I am teaching) that assignment 1 was graded and closed two weeks ago. One of the TAs just accidentally replaced the grade of a student for an activity that had been graded earlier.
How do I lock any updates on the gradebook (so that they require special effort from the teacher)?
Ideally, this lock should happen automatically when grades are released (in a workflow + assignment situation), but then you need something more general (like grades of exams etc.)