MathFox

MathFox, from Hong Kong-based EduTerials, is a simple Web site with more than 44,000 math items--mostly static items like worksheets, puzzles, quizzes and classroom games, many printable and drawn from the math workbooks EduTerials has published over the years.

The site also features placement tests to determine areas of need and to point the student, parent or teacher toward the most useful activities. When played online, individual students or teams can earn completion certificates for completing games, while card and board games are designed for students to play while sitting around a table together.

Many of the activities are free; paying for a site licenses for individual or classroom users unlocks additional content.