Unconscious bias

Susan T. Fiske writes about how prejudice is hardwired in our brains but we can override it, Are we born racist?

Test yourself at Project Implicit, a collaborative research effort between researchers at Harvard University, the University of Virginia, and University of Washington.

The Teaching Tolerance Project gives plenty of background and  explains many concepts and also connects to the implicit project tests.

Havard's Derek Bok Center For Teaching & Learning has a guide for teaching in (racially) diverse classrooms