J.C.
Personally I would let him do the summer class, but I would make him earn the money to pay for it. If he has the money make him pay up front, if not make a chart and have him work it off over the summer by earning money mowing lawns for neighbors and by doing chores you and dad want done like weeding or washing cars, ect. That way you are not holding him back, but he will understand that this is not going to continue to be an easy way out.