AP Chemistry Premium, 2024: 6 Practice Tests + Comprehensive Review + Online Practice (Part of Barron's AP) Neil D. Jespersen Ph.D. and Pamela Kerrigan Ph.D. eBook $18.99
AP Chemistry Flashcards, Fourth Edition: Up-to-Date Review and Practice (Part of Barron's AP) Neil D. Jespersen Ph.D. eBook $22.99
AP Environmental Science Flashcards, Fourth Edition: Up-to-Date Review (Part of Barron's AP) Gary S. Thorpe M.S. eBook $23.99