I was just surprised as usually Pre-AP Biology I taken in the 9th grade (it’s essentially regular Biology I with more rigor and at a more accelerated pace) is a prerequisite to AP Biology, since the latter builds on the former course, since AP courses are taught at the college level (in theory). Pre-AP Chemistry is usually taken in the 10th grade.
What is Calc 3, since you finished with AP Calculus BC?
If you apply to Northwestern’s HPME program, you have to take SAT Subject Exams in Math Level 2 and Chemistry (http://www.feinberg.northwestern.edu/education/degree-programs/hpme/entrance-requirements.html), so just keep that in mind. Is Pre-AP Chemistry taught in the summer?