It's always been about indoctrination.
At least the goal of public education in the last century was to make American citizens out of newly arrived immigrants, especially in the cities. They succeeded for the most part.
My American history teachers weren't the brightest in the world, but if 9/11 had happened back then, they sure wouldn't be standing in front of a classroom, blathering on about the wonders of Islam. The health teacher wouldn't have invited students to explore the joys of homosexuality because if she did, both she and the school board would have been lynched, and the whole school would have boycotted.
Why can't this be duplicated all over the country, modified for public schools?
http://www.stratfordcca.org/index.php
The results seem so much better.