Though we're homeschooling, and not really checking ourselves against AP syllabi, I will note that one of ours, who is much better in math than in language arts, is on track to doing the high school science sequence basically backwards: physics, chemistry, biology. Currently, physics is in parallel with alg II/trig, for that one. And if we're still in high school by then, and need/want another science course, there might be more physics after the first year of calculus.

...pronounced like the long vowel and first letter of the alphabet...