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Purplemath contains practical algebra lessons demonstrating useful techniques and pointing out common errors. Lessons are written with the struggling student in mind, and stress the practicalites over the technicalities. Links and other resources also available.

Free analytical and interactive math, calculus, geometry and trigonometry tutorials and problems with solutions. Thousands of problems and examples with detailed solutions and answers are included in this site. Also explore topics in mathematics using java applets.

Mathwarehouse.com--a website dedicated to Math lessons, demonstrations, interactive activities and online quizzes on all areas of geometry, algebra and trigonometry.

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Educational and entertaining items pertaining to physics, the mathematical sciences, and to mathematics in general.

World's largest and most advanced online repository of math and science simulations for grades 3-12. Research-proven, inquiry-based learning tools for teachers and students. Web-based for anytime, anywhere learning.