Do you have a more specific reply to factual points 1 .. 4?

There are about 3.5 million public school teachers in the US. The idea that they are incredible is not credible. As an Air Force brat, I attended many diverse public schools. Some teachers were good, some were not, most were ordinary folks. I don't recall any being incredible, though this teacher was definitely incredible: https://en.wikipedia.org/wiki/Jaime_Escalante

Any thoughts on this documentary: https://www.imdb.com/title/tt1566648/ ?

The Department of Education has spent somewhere between $5 and $6 trillion since its inception, with no measurable improvement in results.