The gradecentre history report should display the before and after versions of a grade.
eg. instead of : Attempt Grade 16
it should show: Grade changed from 'not graded' to 16, or Grade changed from 5 to 16
The only way to currently get this information is to sift though entire history report, or to view each individual attempt history.
This makes it a very long process to identify any suspicious grade changes.
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