A couple of things to keep in mind. The ACT just announced that it will let you retake individual sections of the test. The SAT still makes you retake the whole test each time. So, if your son did poorly on one particular section of the ACT that pulled down his composite score, he can study for and retake just that section and not bother with the parts he's already happy with. Most schools "superscore" tests now, and college baseball coaches will ask your son for his superscore and to update him if it improves.