I plan to prepare for the AP Exams, SAT Is and SAT IIs, and the ACTs pretty early. I already have the College Board's guide, took the PSAT/SAT course at my school and plan to take the ACT one offered for Seniors in my Senior Year. But there are many guides out there which all say they can assist me. I've searched Amazon and everyone likes the Princeton Review, but some of my teachers have said that The Princeton Review is not the best thing in the world at times and can confuse an individual.

Here are the AP Tests and Subject Tests which I plan to take either this year or next year. Those that are italicized are tentative, as I may not know all of the material because of the course level (Honors vs. AP).

SAT II Subject Tests

Literature
U.S. History
World History
Spanish with Listening
Chemistry
Physics
Biology - E
Mathematics Level II

AP Exams

English Language and Composition
English Literature and Composition
Calculus AB
Calculus BC
Spanish Language
Spanish Literature
Environmental Science
Chemistry
Physics (We don't offer AP Physics, but we do offer Honors Physics...=/)
U.S. History
World History

Also keep in mind that I do not have the money to take these $1000+ courses to prepare for the tests.