<p>Okay, so I've been studying for the Chemistry exam from the Princeton Review book, Sparknotes, and Barrons. In Sparknotes and Barrons, there's some stuff on electron hybridization. Is it even there on the test? Because there's only like a small bit about it in each of them, and it just isn't even talked about in the PR book.</p>
<p>Also, has anyone else noticed that the Sparknotes practice tests are much harder than the Official College Board book's, or is it just me?</p>