They can also use the computer belonging to any family member. In a better world there should be cameras everywhere so we can detect a student not studying as much as the result they bring would require.

Ideally though, mind probes should come into play to find out if they really produced the work.

Honestly after some of the ill-advised-in-retrospect all-nighters at university during which I wrote assignments, I don't think a mind probe would be able to tell much at all!