That the parents are educated and affluent doesn't mean they spend much time trying to be good parents. I know there are good kids from good homes attending private schools but I've seen a lot of rotten kids in private schools.
As it pertains to CC, having curricula standards is a good thing. When kids repeatedly do poorly on the tests yet they continually get passing grades by their teachers, you know which teachers are just going through motions and moving kids along through the system.
The common core standards may be a good idea, but the methods are stupid. The math is particularly strange and seemingly unnecessarily so. They are the product of more over educated educators who are too stupid to teach and that is saying a lot.
The problem stems from the lack of discipline and the denial of the fact that not everyone learns in the same manner and some children, believe it, are stupid. Where do you think Democrat voters come from.