New article on Improve-Education.org lists the ten worst, which includes Sight-Words, Reform Math, Constructivism, Self Esteem, Multiculturalism, No Memorization, Cooperative Learning, Hostility To Content, Hostility To Testing, and Letting Ideologues Run Schools (when what these people really care about is Social Engineering).
Here's the scary part. Any 3 or 4 of these things can completely end serious education. Happens every day.
Want improvement? Just dump the bad ideas. This ain't rocket science. More like what janitors do.
TOP 10 WORST IDEAS IN EDUCATION.
Video makes same points from another direction.