Amc/aime/usamo

<p>Check out these:</p>

<p><a href="http://www.artofproblemsolving.com/AboutUs/AoPS_A_About.php%5B/url%5D"&gt;http://www.artofproblemsolving.com/AboutUs/AoPS_A_About.php&lt;/a> (lots of great information here, as well as forums to discuss math)
<a href="http://www.usamts.org/%5B/url%5D"&gt;http://www.usamts.org/&lt;/a>
<a href="http://en.wikipedia.org/wiki/American_Mathematics_Competitions%5B/url%5D"&gt;http://en.wikipedia.org/wiki/American_Mathematics_Competitions&lt;/a&gt;&lt;/p>

<p>Ask your teacher if he/she has the "Art of Problem Solving" books you can use to study.</p>