>As far as I know, black-majority schools with black teachers (vs. white teachers) don't do any better. Even the ones with more funding than the white-majority schools.
I don't believe white teachers are somehow incapable of teaching black students, but what you state here just isn't true. Harlem Children Zone is a good example of a school that has successfully bridged the academic gap between their students and their more privileged counterparts(from any race).