<p>Hello,</p>
<p>I have taken Precalculus, APUSH, AP Chem, AP Spanish and am self studying AP Language (I got a good CR/Writing score). I am thinking of taking the corresponding subject tests (spanish/with audio, chemistry, US history, sat Math ii, Chem ii, Is it necessary that I buy the corresponding Sat ii books as well or would my AP books/online resources suffice?</p>