Speak to any teacher who is honest.
As others have mentioned there is a cultural divide among blacks and whites with importance to education. Blacks have a terrible gangsta hip hop, no respect to authority culture that is ingrained in them, even the wealthier ones.
But the lack of respect for getting an education, to the point of ostracizing kids that do take it seriously, is eye poppingly foolish and I believe the largest block to blacks making real progress in the country.