I'd Study the following business model...

Re-work it to fit into your current program needs...

And then Rinse and Repeat things into a Real business as part of the whole entrepreneur school Experience.

Maybe not the Answer that you're Looking for But...

An interesting business idea that Popped up recently that some May want to Turn into their own Photo Copy concept.

http://www.springwise.com/marketing_..._for_students/

Phil