Common Core is based on Soviet research in rewiring the child's brain to follow images, not meaning. The model is Chicago based by Erikson Institute(ValJar's Mom) and why Bill Ayers went into the "Education" biz after the Weathermen.
Learn up: http://invisibleserfscollar.com/
Moar specifically, getting the mind wired to desired futures, the Marxist Humanist model.
"Credentialed to Destroy" at Amazon has all the details.
The entire "Accreditation" system was reworked by Arne Duncan to this end. Create Fellow Travelers" from the beginning of Ed.
That all got redesigned under iBama. Kids are no longer trained to think, but to "Reach Consensus", all for the "common good", all Karl like good.
Laid out here: http://invisibleserfscollar.com/
Moar Common Core examined:
https://www.wnd.com/2015/04/common-cores-real-goal-dumbing-down-people/