America’s K-12 students have never been more diverse, with students of color now outnumbering white students. But that diversity ends at the front of the classroom.

As a group, U.S. teachers are still overwhelmingly white and female—and black men are among those most underrepresented in the teaching ranks. To remedy that situation, U.S. Secretary of Education Arne Duncan set a 2015 goal to add thousands more black male teachers in U.S. schools. But while some progress has been made in support of programs working to recruit and place young black male teachers in classrooms, Duncan says there is still more work to be done.