The best SROs I've seen were harder on the other studs than the IPs were. The worst SRO I've seen let people have shitty attitudes without 'adjusting' them in the study room. Remind them the government is paying them (very well) to do something really cool. Half assing it is not only wasteful, it's insulting to a tax payer.
Dropbox, Google Docs sometimes don't work on a gov computer. I'd suggest making a gmail account for the class and emailing everything worthwhile there. You can open that anywhere, including .mil computers. Plus, you can directly email it to yourself or add anything, anywhere without any specific software.