For at least 40 years, teacher preparation has focused on ed courses (process-oriented) instead of content courses. At my state university, secondary-ed majors and minors required exactly HALF of the subject-specific credit hours required by the College of Arts and sciences. Also, the ed school was widely regarded as having the worst teachers in the whole university. Strong students rarely survived the four years of edu-babble. I doubt that things have changed much.
You know, if there was any piece of legislation that I could pass, it would be to blow up colleges of education.
I know that's not politically correct. Those are some of the most resistant, recalcitrant places you will ever get to. And I'm not sure it's going to get a heck of a lot better, because again philosophy and belief drive how their folks are taught and how their folks come out and teach others.
Rigorous Evidence: The Key to Progress in Education? Lessons from Medicine, Welfare, and Other Fields (pdf file)