<p>I am currently taking a class at our school called Environmental Science, which uses the AP ES textbooks, but is much easier, much less in depth, and is only a semester class. I am in Science Olympiad, and this year I am doing an event which heavily intersects with the AP ES material (They even suggest using the AP ES book to study for the event). Since I already have the textbooks and will already be studying a good portion of the material anyways I was thinking I could try to self-study AP ES second semester. Is this realistic, or is it too late?</p>
<p>Follow up: assuming I do self-study, what books should I use? I've heard Barron's is far too hard, and Princeton Review is too easy.</p>