Social Studies

The World Factbook - https://www.cia.gov/library/publications/the-world-factbook/index.html
A wonderful resource by the CIA!  Facts and statistics on every country.

World Flag Database - www.flags.net - Find any flag you are looking for!

The Library of Congress - http://www.loc.gov/ - very comprehensive

50states.com - Tons of facts about each state.
Everything from Admission to the Statehood to the Weather.

Newseum – http://www.newseum.org/ 
An interactive museum of news – also provides 448 front pages from newspapers around the world

National Geographic Expeditions - http://www.nationalgeographic.com/xpeditions/
Xpeditions is home to the U.S. National Geography Standards—and to thousands of ideas, tools, and interactive adventures that bring them to life.  Lesson plans, activities, maps…divided by grade level.

Test Your Geography Knowledge -http://www.lizardpoint.com/fun/geoquiz/index.html
Click on different maps and answer questions about country/state locations.

America's Story - http://www.americaslibrary.gov/cgi-bin/page.cgi
Read biographies of famous Americans, learn about our pastimes, historical data, explore the states.  Wonderful site.

Atlapedia - http://www.atlapedia.com/ - Atlapedia Online contains full color physical maps, political maps as well as key facts and statistics on countries of the world. 

National Archives and Records Administration - http://www.archives.gov/index.html
Digitized versions of of America's greatest documents.  Many educational resources.

Smithsonian Institution - http://www.smithsonianeducation.org/educators/
Gateway to educational resources -

GovSpot - http://www.govspot.com/
Everything about the government and much, much more.