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1voteSecondary. Free materials (multimedia, flash-based) tied to secondary textbooks. Includes text, video and audio files. Subjects covered: Algebra, American relGovernment, Biology, Calculus, Environmental Science, Physics, Religion,US History
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2votearXiv is an e-print service in the fields of physics, mathematics, non-linear science, computer science, and quantitative biology. The contents of arXiv conform to Cornell University academic standards. arXiv is owned, operated and funded by Cornell University, a private not-for-profit educational institution. arXiv is also partially funded by the National Science Foundation.
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2voteGreat tool for chemistry/physics class!
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