Problem solved for physics. AP Phy 2 at his school includes both 1 and 2, so is similar to AP Phy B. My question now is whether he takes AP Chem with AP Phy 1/2 in Jr. Year or only takes AP Phy 1/2 and then takes AP Chem in Sr. year? He will take SAT II in Chem this year becuz his Chem class prepares you for it. He will take SAT II in Phy next year.
Is there a downside to take a gap year between Honors Chem (that he finds super easy and he is taking now) and AP Chem in Sr. Year?