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The most useful tool for SAT preparation. Outstanding online math lessons.

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The biggest library with direct links to books, solutions, dictionaries on all subjects for all of the classes.

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Video lessons on main school subjects from 1-11th grades on opensource.

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Mathematics

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Intellectual search engine that helps solve math equations.

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With the help of this software one can solve examples and equations of all levels of difficulty.

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There are explanations of the school material, the solutions of problems and examples, cribs with formulas.

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English

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Awesome TOEFL prep course. Learn English easily! (I bet it's fun!)

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Cheerful educational portals for children aged 5 to 12 years, and 13-17-year-olds.

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Youtube channel with video lessons on various educational topics.

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Biology

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Accessible materials on botany, zoology, anatomy, biology and ecology.

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Collected information on almost all types of animals and plants.

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For convenience, all materials are classified according to the level of complexity: from 1 st to 3 rd.

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Chemistry

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interactive multimedia kit for high school.

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Illustrated materials on general, organic and inorganic chemistry.

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Electronic library of educational materials on chemistry.

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Physics

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Web-site for physics teachers, students of grades 7-9 and their parents.

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All that is popular about science.

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