Hi Laura,
We have not yet implemented that feature, but have it on our backlog. We do have a few questions about how the feature should behave exactly, so any insight from you would be helpful.
Would it be sufficient to let you set a date/time, after which no student could make changes to their copy of the project?
Or would you want it to be something where the student manually submits their project, after which they could no longer make changes, and you would be able to see which students had/hadn't submitted?
Or both?
Also, would it be important for you to be able to override the "lock" for a given student, so that you could allow an individual student to make changes after the cutoff date / after they submitted the work?
Thanks,
Robby