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Fact Monster is a free reference site for students, teachers, and parents. Get homework help and find facts on thousands of subjects, including sports, entertainment, geography, history, biography, education, and health.

Powered by the number 1 non-fiction media brand in the world, Discovery Education transforms classrooms and inspires teachers with engaging content and services that measure and improve student achievement.

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Refdesk is a free and family friendly web site that indexes and reviews quality, credible, and current web-based reference resources.

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Yahoo! Groups offers free mailing lists, photo & file sharing, group calendars and more. Discuss hot topics, share interests, join online communities.

Tutorvista provides Online Tutoring, Homework Help, Test Prep for K-12 and College students. Connect to a Tutor Now for Math help, Algebra help, English, Science

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Infoplease.com, a free, authoritative, and respected reference for Internet users, provides a comprehensive encyclopedia, almanac, atlas, dictionary, and thesaurus. Infoplease.com contains facts on all subjects including sports, entertainment, techno...

Sceince Teacher is a powerful but easy-to-use diagramming software for creating diagrams and schematic of physical, chemical, electronics and mathematics and more.