Setup Create a course with a few gradable activities (e.g. assignments, quizzes, forums, etc.) Take note of the minimum/maximum grades for these activities. Enrol at least one student in the course As teacher/admin, go to the course's Grades > View > Single view report page. Note: Test this on different supported browsers. Test - View by Users Set View by to Users Select a student Turn editing mode on, Override all on the Actions menu. Try to edit the grade of the student Confirm the grade input fields now accept only numeric values. Try to enter a non-numeric value (e.g. on Firefox or by copy-pasting a non-numeric text). You will get a data validation error, or it will simply ignore the non-numeric input. Confirm that you get a validation error if you enter a value below the minimum grade or above the maximum grade. Try to edit a feedback field Confirm that you can enter any text on the feedback fields. Test - View by Grade items Set View by to Grade items Select a grade item Turn editing mode on, Override all on the Actions menu. Try to edit the grade of the student Confirm the grade input fields now accept only numeric values. Try to enter a non-numeric value (e.g. on Firefox or by copy-pasting a non-numeric text). You will get a data validation error, or it will simply ignore the non-numeric input. Confirm that you get a validation error if you enter a value below the minimum grade or above the maximum grade. Try to edit a feedback field Confirm that you can enter any text on the feedback fields.