U.S. Department of Education data showed that Black students, especially boys, face much harsher discipline in public schools than other students. Although Black students made up only 18 percent of those enrolled in the schools sampled, they accounted for 35 percent of those suspended once, 46 percent of those suspended more than once and 39 percent of all expulsions, according to the Civil Rights Data Collection’s 2009-10 statistics from 72,000 schools in 7,000 districts, serving about 85 percent of the nation’s students. The data covered students from kindergarten through high school. One in five Black boys and more than one in 10 Black girls received an out-of-school suspension. Overall, Black students were 3 1/2 times more likely to be suspended or expelled than their white peers.