Math Counts Problem Solving Problem of the week and archive, Warm-Ups and Workouts, Problem Solving Strategies, Extended Activities, Algebraic Reasoning, and other resources are offered at this site. This site is a collection of grid based number puzzles, ideal for classroom use or to tax a puzzle fiend. This site features an interdisciplinary Web-based project designed for middle school math students to determine how much it would cost to build an Egyptian pyramid today. Problem of the Month MathMagic on the Web. A collection of problems arranged in Grade levels geared at providing motivation for students to use computer technology while increasing problem-solving strategies and communication skills.
Teams register to pair up with another team and engage in problem-solving dialogue.
Archives of past challenges available. All sorts of puzzles, crosswords, and many others. An archive of puzzles from mathematicians, philosophers, and others. 21st Century Problem Solving Examples of problem solving using reliable problem solving methods. The main focus is on pre-college algebra.