HEATKEYS

The Khan Academy is a not-for-profit 501(c)(3) with the mission of providing a world-class education to anyone, anywhere. Despite being the work of one man, Salman Khan, this 1600+ video library is the most-used educational video resource as measure...

Coolmath has a ton of cool math games and puzzles, lots of really clear math lessons (arithmetic, fractions, decimals, algebra, etc.), fractals, geometry, tessellations and more. Tons of very cool math stuff for kids, teens, parents and teachers too!

Free math lessons and math homework help from basic math to algebra, geometry and beyond. Students, teachers, parents, and everyone can find solutions to their math problems instantly.

Study math online for free. With Mathplanet you can get math tutoring online and help with Pre Algebra, Algebra 1, Algebra 2 and Geometry. Get SAT and ACT worksheets for math.

Software for math teachers that creates exactly the worksheets you need in a matter of minutes. Try for free. Available for Pre-Algebra, Algebra 1, Geometry, and Algebra 2.

Smart, fun, plain-spoken study guides and teacher resources. Digital textbooks by Ph.D. and Masters students from Stanford, Harvard, Berkeley

Math help since 1998. Math Goodies helps kids at all levels with interactive instruction and free resources. Get help online or offline.

Math explained in easy language, plus puzzles, games, quizzes, worksheets and a forum. For K-12 kids, teachers and parents.

Action packed math site for elementary and middle school students featuring math games, math word problems, math worksheets, logic puzzles, and math videos.

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Known for the ACT test, a college entrance exam, ACT is a nonprofit organization offering educational and workplace measurement and research services.