<p>In addition to what Llama said:</p>
<p>Although I don’t go to Caltech (I’m just a hopeful applicant), I also have Caltech textbooks for 1st year Chemistry, Calculus 1-3 w/ Linear Algebra, and Physics in ebook. I’ve been using these to study independently to hopefully test out of some first year classes of the college I’ll hopefully be attending next year (too many 'hopefully’s, I know). Using these sources along with</p>
<p><a href=“http://www.math.caltech.edu/courses/1term06.html[/url]”>http://www.math.caltech.edu/courses/1term06.html</a></p>
<p>which has links to all Caltech problem sets and their solutions, you can really get a lot accomplished. If you want the ebooks, PM me with your e-mail account. And I’ll back up Llama’s comments: don’t waste time. Bored? Take a class or, alternately, pick up a number theory or abstract algebra textbook and study thoroughly. I’ll also expand and tell you not to do something you really don’t want to do just to get into college – I picked up some ECs and hated them, and really wished I hadn’t done them in the first place. Be active – but only in the things that you really want to do.</p>