This site is home to the most comprehensive look at volunteering and civic life in the 50 states and 51 cities across the country. Data includes volunteer rates and rankings, civic engagement trends, and analysis.
Available online this resource contains words, concepts and names related to the United States Government such as those you commonly hear and read in the news. You'll find short entries about Presidents and Supreme Court Justices (current through 2001) by searching by last name. Look up major supreme court cases or find out the real meaning of "pork barrel politics" in this resource!
These reference sources provide an excellent overview of the structure and function of the United States Government.
This is the official handbook of the federal government. The manual beings with reprints of the Constitution and the Declaration of Independence, and goes on to provide "comprehensive information on the agencies of the legislative, judicial, and executive branches."