If high-quality teachers don't want to work in schools where students of one race predominate (a claim that seems dubious, for the reasons Mike points out), this fact??remains: students at lots of schools are going to be of the same race. Alas, housing patterns make it so. The nation should've learned from its busing experiences--which hastened k-12's racial separation--that socially engineered school assignments don't work. Forcing students to attend class across town, whether it encourages more highly qualified teachers or not, is no longer a realistic option for school districts. We waste time acting as if it is.