Any reform involving private schools in the US needs to be wary of its effect on ideological and cultural divides. We already prefer to live near like-minded people, it's not a stretch to assume we'd send our kids to like-minded schools.

To be more specific, we don't want our school system to become a proxy for culture wars - individual schools marketing themselves to parents as a place which builds proper (liberals|conservatives|tea partiers|greens|etc).

No matter what shape reform takes, society needs to make sure its people get a well rounded education.