The percentage of blacks or other minorities on the campus would make no difference. It also seems to me that the dominant group in society needs to learn a lot more about race because it is incredibly naive. And increasingly, minorities, especially African Americans, are coming to the University without adequate knowledge of their own background. For these reasons, it is crucial no matter what the demographics. The specifics depend on the class, of course, but whatever the subject matter, you have to be very careful not to present facts without explanation.
Students have a tendency to use the facts to reinforce their stereotypes.
It is critical that you get to explanations very quickly. Also, it's not just important how we present material but also how we provoke students such that they will be interested in the subject matter. One of the things I try to do is present provocative issues about which every student in the room has a position. Now the reading and whatever I'm saying is no longer irrelevant, it's extremely relevant, because the students use it to strengthen their argument. They begin to participate in a dialog because they care about the issues being discussed.