If grades have been changed on Minerva and you need to find out when or by whom, check the Grade History.
To view the grade history for a particular student’s submission, click on the action link in the relevant cell. Select View Grade Details.
You should see submission details for the student. Select the Grade History tab to view details.
You can also view the grade history for the whole Grade Centre. To do this, go to the Full Grade Centre page and select the Reports action link and then View Grade History. The full grade history will open.
Note you might need to change the filter - 14 days are shown by default.