There is an urban myth that tests for students and teachers are "culturally biased." (I don't think I've heard the same about tests for doctors, lawyers, or accountants.) Let's not blame the messenger for telling us the bad news. There has been extensive combing through these tests trying to find the "bias."

It has not been found. It is not there. Sometimes what "we all know" is like being in "The Truman Show" -- it's real to Truman, but that doesn't make it reality.