If you think kids from "together" families in impoverished minority neighborhoods have anything approaching equal educational opportunities to their middle class white counterparts, I think you should do some more research.
But if you want to make it about single parent households, I just have a hard time comprehending the "sorry kid, your parents suck" attitude. It would make me a lot prouder to be an American if there was a minimum guaranteed opportunity for success for every kid here, even those unlucky enough to have a bad family situation. It would probably be better for the economy, too. There's so much opportunity thrown away on people who never really had much of a chance because of what they were born into.
Even if you do want to blame the parents, which I think is a dubious argument, we're taking about kids. It's not their fault. Don't you feel a little cold-hearted with this attitude?