Research shows black students are punished more severely. Why don’t schools believe it and fix it?

Marquise Miller, 8, who came with his mother, holds a sign outside Marietta Municipal Court during their peaceful demonstration against decisions not to indict white police officers in the deaths of unarmed black men in Ferguson, Mo., and in New York City on Saturday, Dec. 6, 2014 in Marietta, Ga. (Hyosub Shin/Atlanta Journal-Constitution/TNS)