Allow students to unsubmit and edit their submission after the due date without me changing the due date. Currently, I have students who miss a day and will be halfway through an assignment when they're absent. Usually, they submit the assignment after each writing period and unsubmit and edit when they return. However, if they return after the due date, they can't work on it. Maybe a setting that allows students to unsubmit and edit would work? Or something that allows them to request edit access from the instructor? Or even the ability for the instructor to manually unlock individual submissions for edits would be great.