I'm not sure. But as much as my lack of knowledge may be indicative of Africa's supposed inferiority, it is also indicative of my Euro-centric education. I'll bite, though. We're strictly talking sub-saharan Africa, right?
Off the top of my head, I know that Mali was one of the world's great kingdoms/empires, and that Timbuktu was one of the greatest places of learning at its height, but I don't remember when that was. Gold was in abundance. Songhai was another powerful kingdom.
I also know that much of sub-saharan Africa remained tribal while European powers centralized into nation-states. This occurred for a variety of reasons, such as Europe's high population density and limited resources forcing people to organize more efficiently, while Africa's low pop density and abundant resources eliminated that need. More importantly, this doesn't mean we should exclude African history (although I was specifically talking about black American history in my post) from our history courses. I went to a good school in the state with the best school system, and I had an especially good teacher. Can we say the same for most other kids?