The government probably wouldn’t allow this,
but the solution to the unruly kids ruining a school is simple -
kick ‘em out.
If the parents want their kids to be in a school where they have been warned about their behavior, the parents will be sure the kid shapes up.
Again, though, the government wouldn’t allow this. Liberalism is all about there being no consequences for behavior.
We have a program in our kids’ private Christian school, grades 7-12, where we raise funds for scholarships for underprivileged kids. Sure, those middle school kids come in sassy and underperform at first, but by their senior year they are transformed. They have real hope and real skills, and easily manage to get scholarships into good, primarily Christian, schools.
As for the kids who are hard cases and don’t fall in line, they get kicked out. It happens enough so that everyone knows it’s a real possibility. But they are a small minority of the scholarship kids.