Separation of School and State

Okay, I'm convinced.

When schools are run by the government, the details of ninth-grade biology classes, the propriety of patriotic rituals, and every other educational issue—ranging from how to teach math and reading to the contents of vending machines—becomes a political issue. Even when the arguments don't end up in court, they generate acrimony and resentment that could be avoided if education were entirely a private matter.
I'm not suggesting that parents would be completely satisfied with their children's schools if the government got out of the education business. No doubt they would always find something to complain about. But if they were not compelled to pay for government-run schools, they would be in a better position to choose schools that reflected their values and preferences, and the compromises they made would be voluntary, instead of terms imposed by the winning side of a political battle.