Select the "Assignments" tab.

Select the assignment name for which you want to delete scans.
Note: Your are automatically taken to the "Scans" tab.

Select the box before each student's name for which you want to delete the scanned assignment.
Note: To delete an entire class use the "Select All" feature from the drop-down menu.

Select the "Delete" button.

Confirm the deletion by selecting the "Delete" button.