The number of black teachers has dropped in nine U.S. cities - The Washington Post

https://www.washingtonpost.com/local/education/the-number-of-black-teachers-has-dropped-in-nine-us-cities/2015/09/15/9e86878e-5be6-11e5-8e9e-dce8a2a2a679_story.html

Diversity is a key component to equality and opportunity