I came across a few resources when I started studying for the final. My teacher recommends the Barron's Review Book. She also recommends the Barron's flashcards. You could find them on Amazon.com for a decent price. I also found this website: http://teacherweb.ftl.pinecrest.edu/snyderd/MWH/AP/definitions/APdefinit... [4]

It defines vocabulary and further explains theories.

Good Luck with your studies!