I have an excellent memory as well - steps over into photographic sometimes - and never needed to learn how to study. After I got to university, I ended up discovering that I actually do WORSE on exams when I spend time studying. Your son may be like me: his mind picks up everything it's ever going to on the first or second pass. If that's true, my opinion is he'll probably never benefit from the experience of "studying for a test"; his time would be much better spent learning NEW things.