If you knew many good teachers, and were actually capable of hearing what they have to say about the realities of teaching, they could tell you how many things are wrong with the things you keep saying. They would know a little — and some would know a lot — about the history of education, especially in the U.S. over the last hundred years, a little from their personal experience of school politics and teaching practice and a little more from their academic courses and professional reading.
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But of course you don't know any good teachers who could teach you those things — they quit being good teachers just as soon as they tell you what you don't know. And that is precisely why the history of education in the U.S. over the last hundred years has taught those who are capable of learning from it the critical importance of academic freedom, peer review, seniority, and the tenure system.