Who was the first African American woman to teach in a white school?

I have to find an article for class tomorrow on the first African American women that taught in a white school. I have searched the internet and can't find it anywhere.

Charles L. Reason was one of the first...

"In 1849 Reason became the first African American to hold a professorship at a predominantly white American college when he was hired as professor of belles lettres, Greek, Latin, and French and adjunct professor of mathematics at the integrated New York Central College in McGrawville (Cortland County), New York"