SAT II in June

<p>Hi guys, I am taking Chemistry, U.S History, and Math 2 this June. I was just wondering if you guys could provide some tips/ what to focus on on these tests. I am pretty confident in Math, but unsure about U.S History and Chemistry. In Chemistry, I know most common stuff, but not sure if I should study more in advanced stuff like Quantum Mechanics, Atomic spectra and other equation/formulas. I am cramming the Barron book right now and there are several intricate topics that I never learned, so can you tell me what topics will most likely be on the official test.
Also, I am having a regular U.S History class right, which covers from columbus to the civil rights movement. I know that such regular class may not prepare me enough to take the test, so I am planning to cram the Amsco and Barron's US History books for 2 weeks. I don't know which book is better because Amsco is for APUSH and Barron's is known for containing too much unrelevant materials. And what topics (events, period, etc) I must focus on?
My plan is to cram 2 weeks for Chemistry and 2 weeks for U.S History. The first week is for cramming the books (strategies and relevant topics). The second weeks is for practice tests. Do you think my plan is good to aim for at least >760 for all the tests?</p>

<p>Thank you very much!</p>