<p>Can you guys recommend me some prep books? Also, how difficult are these tests? </p>
<p>Thanks.</p>
<p>if you take them right after taking the classes in school then they aren't bad at all. I'd say that bio is slightly easier than chem. i got a 800 on bio and a 780 chem. I had AP Bio and AP Chem just prior to taking the SAT II's so I didn't really study for them other than reviewing my AP Chem review book.</p>
<p>Ah okay, thanks for replying. :)</p>