@pamom414 as @sawadeeka said, your son will only get elective credit for the history and spanish. But even elective credit can be useful down the road, because certain classes require Junior standing. 9 AP credits per passed test gets you to Junior standing much sooner. My daughter came in with only 24 AP credits towards her major, but 63 units total. Between that, doing quarter+, and then a normal class load, I think she’ll be a “Junior” next week after finals finish. 
(She’s a first year student).