If your education was anything like mine, the only plays you were exposed to in high school were the Shakespeare you read in English class (Romeo and Juliet, Hamlet, maybe King Leer or Macbeth) and whatever your school performed for the yearly musical (Guys and Dolls again?). Maybe around senior year you got yourself a Death of a Salesman and/or Glass Menagerie. Once you got to college you picked those two up, some more Shakespeare, maybe Our Town or Die Fledermaus.
You know what, they're all good plays and there is a reason they are timeless (well, aside from that last which is technically an opera). But I will admit that I went through all of high school and all of college (earning a theatre degree!) and I never read a play written by a black playwright.
A couple years ago I saw Fences by August Wilson and was blown away. I mean, blown. away. I went from the Huntington all the way to North Station without speaking (and really, me anywhere not speaking is a bit of a big deal) because I was still reeling from the play's impact.
It is one of ten plays Wilson wrote, each representing a different decade in the 20th century and he African experience of that decade. Fences is set in the fifties after Jackie Robinson and World War II where America is beginning to integrate but hasn't yet reached the civil rights movement.
I wish I had read/scene this play in college. Hell, I wish I had scene/read it in high school. It was the single most powerful bit of theatre I have ever been exposed to and I think I would have approached my college experience entirely different if I had scene it first.
If you are in the New York area or will be traveling there, there is a play written by a black playwright while she was in residence at the Huntington. It's called Stickfly and I saw it when it ran in Boston. It's about black families on Nantucket island. It has some hard hitting dialogue and doesn't just sing a "I'm so persecuted" song. It challenges all its characters and is finely done. Give it a try if you have the opportunity.