Education Secretary Arne Duncan said last week that the Obama Administration will ramp up investigations of civil rights infractions in school districts, which might sound well and good. What it means in practice, however, is that his Office of Civil Rights (OCR) will revert to the Clinton Administration policy of equating statistical disparity with discrimination, which is troubling. OCR oversees Title VI of the 1964 Civil Rights Act, which prohibits discrimination by race, color or national origin in public schools and colleges that receive federal funding. In a speech last week, Mr. Duncan said that "in the last decade"—that's short...