If you'd like to feel your head spin, try to understand the justification for Constructivism, a destructive pedagogical theory and method that has infested K-12 education.

 Let me sum up the situation with the words of Allen Ginsberg:

"I saw the best minds of my generation destroyed by sophistry

 scheming  hysterical shameless, drugging themselves on subversive theory..."

  On the other hand, probably no one should waste time trying to understand this gimmick. But it's very important to understand how it  ramifies through the K-12 system. Specifically, it tells teachers they can no longer teach. Imagine that. It is so radical and sweeping, I'll bet the Education Establishment can still cannot believe they get away with it. Just like that, the lights went out everywhere.

 New article on American Thinker explains why Constructivism is a phony:

  "K-12: Constructivism is a big fat con."

http://www.americanthinker.com/articles/2017/03/k12_constructivism_...

 If we have serious education reform, one of the first things to happen will be the elimination of Constructivism, maybe not 100% but certainly 85 or 90%. I'm sure clever teachers can find the occasional use for any gimmick.