<p>If he is not interested in AP Bio (which I think would benefit him if there is a good teacher), he has to look for a some kind of an applied chemistry or physics class . As for math - linear algebra and /or differential equations, which would also happen outside of his school. However…could he possibly take AP Stats at the school and another, more challenging math class through, let’s say AoPS? (trust me, they do have courses that go beyond calculus BC 
). My DS was in a similar situation since ending his freshman year of HS and he ended up taking classes at the local college. It was “extremely” inconvenient (also a very long commute), so my advise would be to stick with whatever the HS is offering. It will make his life much easier 
PM me if you want more specific info…</p>