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ATID Jewish Encyclopedia [ Kids/Teens/Mature Teens ] - The Jewish Encyclopedia For Kids is made as an online educational site for children who are interested in Jewish facts and history.
Bartleby.com Reference [ Kids/Teens/Mature Teens ] - Reference site allows you to search over the Columbia Encyclopedia, the Encyclopedia of World History, fact books, thesauri, quotes, and more.
Children's Encyclopedia of Women [ Kids ] - Collection of articles about famous women written by third and fourth grade students.
Columbia Encyclopedia - 6th edition [ Teens/Mature Teens ] - Comprehensive online encyclopedia and database of over 51,000 entries.
Encyclopaedia Britannica [ Teens/Mature Teens ] - Provides complete text of Encyclopaedia Britannica with search capabilities, related links, and multimedia enhancements. Free trial available.
Encyclopedia Smithsonian [ Kids/Teens/Mature Teens ] - Links to online Smithsonian resources and answers to frequently asked questions from A to Z.
Encyclopedia.com [ Kids/Teens/Mature Teens ] - Free resource offers more than 57,000 concise articles.
EncycloZine: Learning Fun! [ Kids/Teens/Mature Teens ] - EncycloZine is a concise illustrated encyclopedic portal covering a wide range of topics in the arts, humanities, sciences, and technology. It also features games, puzzles, quizzes, and a multimedia gallery.
How Stuff Works [ Kids/Teens/Mature Teens ] - Articles explain how hundreds of things work, from elements of the human body to space-age technology.
Instrument Encyclopedia [ Kids/Teens/Mature Teens ] - A guide to more than musical 140 instruments from all parts of the world. Includes photographs and descriptions.
MSN Encarta Encyclopedia [ Kids/Teens/Mature Teens ] - Includes a world atlas, dictionary, thesaurus, multimedia collection, and homework tools.
Open Site [ Teens/Mature Teens ] - A volunteer-run open content encyclopedia, inspired by the Open Directory Project.
Spartacus Educational [ Kids/Teens/Mature Teens ] - British online encyclopedia focuses on historical topics. Articles are geared toward students.
TechEncyclopedia [ Kids/Teens/Mature Teens ] - Contains descriptions and definitions of more than 14,000 computer terms and concepts.
VetCentric Encyclopedia [ Mature Teens ] - Find articles on animal health care topics ranging from behavior and preventive care to common and not-so-common diseases.
Wikipedia [ Kids/Teens/Mature Teens ] - Free volunteer-edited encyclopedia with over 2.1 million articles.
2007 Wikipedia Selection for schools [ Teens/Mature Teens ] - Selection of Wikipedia articles chosen and checked for accuracy.
wordIQ.com [ Teens/Mature Teens ] - An online encyclopedia with more than 400,000 pages of content.
World Book Encyclopedia [ Kids/Teens ] - Offers in-depth information on a variety of subjects and educational activities for children.