Hi @JeffreyBurleson,

It appears to me that once the student marks as done, that is permanent for that specific content item.  Even if you edit the item content significantly, there doesn't seem to be a way to unmark it as done (f that's what you wanted).  I'd say if there are major changes, it may be better to create a whole new page and add it to the module rather than edit existing things students may have already completed.

Hope this helps a bit!

-Chris