The rights of children have historically been neglected, and so we inflict on them what we dare not inflict on ourselves.
I realized as a child that my parents were sending me to a fucked up place. They did it because they were out to lunch and not paying attention. I've never understood why most people, who sincerely love their children, send them to these places.
Education per se is the secondary reason for their existence. The primary reason is conformity, which they are much more successful at achieving (than education.)
The single, simple metric to tell whether or not your school system is actually educational is the ratio of teachers to children. The range of 1/6 is probably the upper limit. You might get away with 1/10 if the teacher is truly magical. The modern ranges pr 1/20 - 1/40 are absurd. Fucked up Lord of the Flies shit goes down when you get that many kids together w/o adequate supervision. You were all children once, you know what I mean.
Modern "school" systems are hell-worlds. If you love your children, don't send them to hell-worlds.