My son took chem "on level" and took the SAT chem subject test (grade pending), this year. He used a co-op with a bio-chem major retired medical doctor teacher. He also needed tutoring. More later.
1. A Beka: We hated it, both tutors hated it. They felt that it was too condensed and not enough explanation. If you don't get the concept, tough luck. It is a thin volume. Math gives one example. Teacher felt math was too light and added more of her own design.
(Tutor 1 was used a few times before moving. He hated the book.)
Mainly we used a tutor who is a bio-chemist now works as a col