In order to officially close grading, you may choose to lock the grading capabilities within your Hubb site. After grading is locked, Graders will be able to view their grading progress, but will not be able to make additional updates.
Tip: Once you have locked grading, you may want to consider updating the messaging on the Grader Dashboard to let them know that grading is now closed. For more information about updating dashboards, check out this article.
Here is how you can lock grading on your site:
Under the Admin tab, go to Event, and Setup Properties:
Click on the Event Options tab and press edit in the upper right of the screen.
Under Session Options, check of Is Grading Responses Locked, and press save.