Everyone files on a 1040 now. Nothing special about being a student. Is someone claiming them as a dependent?
If they only got a W2 for under 12,200 they don't have to file except to get back any withholding taken out. If it is more or they got a 1099Misc for any amount they do have to file a return.
Be sure on their return they check the box that says they can be claimed on someone else's return. That is VERY important!