Internet Guide

Preparing for MATHCOUNTS or the AMC contests, and having a tough time with number theory problems? Read Art of Problem Solving's Introduction to Number Theory by Mathew Crawford.

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Books
AoPS Internet Guide

The Art of Problem Solving Internet Guide includes links to the following:

Our favorite educational websites.
Numerous national and local math contests.
Pages with practice math problems.
Summer Programs.
Scholarships of interest to outstanding problem solvers.

Want to learn how to tackle those tough AMC/AIME/Olympiad counting and probability problems? Check out Art of Problem Solving's NEW Intermediate Counting & Probability by David Patrick.