White House http://www.whitehouse.gov/
US State Information http://usinfo.state.gov/usa/infousa/
US State Department http://www.state.gov/
American Presidents http://www.americanpresidents.org/
Immigration and Naturalization Service in the USA http://www.ins.usdoj.gov/graphics/services/natz/index.htm
If you want to study in the USA
http://usinfo.org/usia/usinfo.state.gov/usa/infousa/educ/studyus.htm
Education in the USA. U.S. Department of Education
http://www.ed.gov/NLE/USNEI/us/org-us.html
Encyclopedia Word IQ
http://www.wordiq.com/search/harvard+university.html
Foreign Relations of the USA. U.S. State Department
http://www.state.gov/www/policy.html
Historical Documents
Chronology of US historical documents http://www.law.ou.edu/hist/
Documents for the study of American history
http://www.ku.edu/carrie/docs/amdocs_index.html
Avalon http://yale.edu/lawweb/avalon/avalon.htm
Core Documents of U.S. Democracy
http://www.access.gpo.gov/su_docs/locators/coredocs
The Constitution of the USA
http://www.nara.gov/exhall/charters/constitution/conmain.html
The Bill of Rights
http://www.nara.gov/exhall/charters/billrights/billmain.html
Famous American Speeches
http://usinfo.org/usia/usinfo.state.gov/usa/infousa/facts/speeches.htm
National Archives http://www.nationalarchives.com/
The Constitution Community http://www.nara.gov/education/cc/main.html
Historical Maps
Cultural Maps in American Studies
http://xroads.virginia.edu/~MAP/map_hp.html
Map Collection
http://www.lib.utexas.edu/Libs/PCL/Map_collection/histus/html
Geography and Tourism
Your Link to America http://www.onlinecityguide.com/
The US 50 http://www.theus50.com/
State Information http://www.stateinformation.com
USA Travel and Geography http://www.usembassy.de/usa/travel.htm
50 American states: facts and figures http://www.50states.com/
National Association of Counties http://www.naco.org/counties/counties/index.cfm
The Regions of the USA
The Wild West
http://www.thewildwest.org/
http://www.usembassy.de/usa/newengland