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Explore the updated online encyclopedia from Encyclopaedia Britannica with hundreds of thousands of articles, biographies, videos, images, and web sites.

THE starting place for exploring Geography, from your About.com expert Guide to geography. Learn about all concepts of geography, find geographic information, maps, and more. Includes geographic information about every country and state as well as ...

U.S. History covers the development of the United States from the history of early exploration through modern times. American historical people are presented in the context of the development of the American nation on political, economic, and social...

Princeton University is a vibrant community of scholarship and learning that stands in the nation's service and in the service of all nations.

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...

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The Gilder Lehrman Institute offers seminars and lesson plans for teachers as well as fellowships and forums for U.S. History students and scholars.

Encyclopedia.com – Online dictionary and encyclopedia with pictures, facts, and videos. Get information and homework help with millions of articles in our FREE, online library.

Do you want to learn Portuguese? Great! Here you can learn useful Portuguese phrases, Portuguese words and explanations about the culture and much more. Learn Portuguese quickly now.