Report: Students don't know much about US history

Just 13 percent of high school seniors who took the 2010 National Assessment of Educational Progress, called the Nation's Report Card, showed a solid grasp of the subject. Results released Tuesday showed the two other grades didn't perform much better, with just 22 percent of fourth-grade students and 18 percent of eighth-graders demonstrating proficiency.

The test quizzed students on topics including colonization, the American Revolution and the Civil War, and the contemporary United States. For example, one question asked fourth-graders to name an important result of the U.S. building canals in the 1800s. Only 44 percent knew that it was increased trade among states.

The scores on the history test did not vary remarkably from years past; in 1994, for example, 19 percent of fourth-grade students scored proficient or better in U.S. history.

To be considered proficient, they had to get certain scores out of 500. For fourth-graders, the score was 243. Eighth-graders needed 294, and 12th graders had to get a 325.