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.