They are required to turn in a final draft, just like with the Slice of Life stories. If they don't want to turn in a written copy, they can post their final draft to Edmodo.
I taught them how to write one today using an outline form. Here is a copy of it:
I also wrote one of my own and posted it to Edmodo. I think reading it and using it as a guide will help them (and you) a lot.
I'm looking forward to reading their first critiques on Monday!