If you want to know how our educational system became so far left David Horowitz spells it out in his book:
Radical Son: A Generational Odyssey Paperback – April 21, 1998
by David Horowitz (Author)
You will find out the goal set by the leftist (Communists) early on and how their ides became fact.
Horowitz is a national treasure. I wish he got a lot more air and print exposure.