Professor Ogbu was invited by black parents in 1997 to examine the district's 5,000 students to figure out why....For example, he said that middle-class black parents in general spent no more time on homework or tracking their children's schooling than poor white parents. And he said that while black students talked in detail about what efforts were needed to get an A and about their desire to achieve, too many nonetheless failed to put forth that effort....Not surprisingly, he said, the parents were disappointed when he turned the spotlight on them as well as the schools.
As a teacher, I find it amusing that the parents themselves hired Professor Ogbu, presumably to find a scapegoat in the school system for their children's lack of success, but were offended when he found the problem was closer to home.
That's how liberals teach statistics: determine what you want as your outcome, then find someone, anyone, who will support it, no matter how outlandish it sounds.