I wouldn’t study for Calc AP.
What is your budget? That’s important.
What does he seek in a school - location wise, size, environment (rural, urban, suburban), sports or not, religion or not, etc.
There will be tons of schools for him and he can major in Chem…no need for back up.
But budget and desires will drive a list.
So need to know more before I can throw out school names.
But it’s not tricky at all - GPA and ACT…once we know the desires and budget.