There's a good chance that any parent that can afford private school would send their kids there anyway, no matter what city they lived in.

Back before this all happened, some public high school systems were very good, top notch. As the move to voucher systems happpened, it was predicted that there would be a drain on public schools and that public schools would lag. So we created segr3agation based on affordability lines. In CA I knew people who moved into neighborhoods because of the school system and how they were rate wouold help your kids get into good Universities. Then the system is forced to take some students from outside and the parents are pissed as the ratings go down.

I remember taking standardized test when I was young and because my parents spoke English well, I knew proper English. I could eliminate a couple of wrong answers on multiple guess because the English wasn't right. I had an advantage, the odds were in my favor. It doesn't seem right to do that on a history exam, etc.