At American Thinker, Chuck Roger considers the damage done to education by John Dewey:
Psychologizing introduced an emotionalism to education that defocused the student from facts, knowledge, and contributing to the prosperity of society. Teachers gradually split into factions, with ruinous consequences for American society. Some teachers continued to embrace the knowledge goal, but many of them began to indoctrinate their captive young sponges in "critical thinking" -- a euphemism for rabidly questioning everything and adopting a mindset that rejects all that has gone before. Traditional American values and free-market capitalism have become primary targets of critical thinking.
Roger also notes Candace de Russy's post on how sociology today encourages students to hate America.