Learn about these things and more:

• The U.S. population increased by nearly 10% since the 2000 census.
• In 2009, 16.7 percent of people in the United States were not covered by health insurance.
• Of the 77.3 million people ages 3 and up enrolled in elementary, secondary, and post-secondary schools in 2009, 86.5% were enrolled in public schools in 2009.