"exactly what do ed schools purport to teach?"
From an ed school, here are six principles they purport to teach:
Working in education is a moral act based on an ethic of care.
Working in education is a collegial act.
Working in education is reflective and inquiry-based.
Working in education is a political act.
Working in education is acquisition of subject matter and professional knowledge.
Learning is a constructivist and developmental process.
Notice -- nothing about classroom management, discipline, student achievement, or fundamentals. Lots of philosophy of education, constructivism, and (buried in the principles) diversity. At my own school, I've been to admission events with folks from the ed school. Things they talk about: reducing the achievement gap, making sure to teach history students about the genocide of American Indians and similar politically correct stuff. Things they don't: gifted students, subject matter, science/math education, actually teaching.
I'm afraid I have to agree with Barry -- this book won't crack the ed school shell. It is just too thick.