In Washington area, African American students suspended and expelled two to five times as often as whites - The Washington Post

Experts say disparities appear to have complex causes. A disproportionate number of black students live below the poverty line or with a single parent, factors that affect disciplinary patterns. But experts say those factors do not fully explain racial differences in suspensions. Other contributing factors could include unintended bias, unequal access to highly effective teachers and differences in school leadership styles.