Early this week, Richard Hake, a physics professor, had shared a link with us for a video on Eric Mazur's talk "Confessions of a Converted Lecturer." The link to his talk is http://www.youtube.com/watch?v=WwslBPj8GgI.
Eric Mazur used to believe that his lecturing had made him a great teacher and that his students really were learning physics. But he then later discovered that his students were merely memorizing information and that his course did not help increase their conceptual understanding of physics. Many of his students could make some rather sophisticated calculations on exams, but they had little understanding of the basic principles behind physics.
I will post my thoughts later about Mazur's talk. I recommend it highly because this talk provides yet more evidence of the problems of relying on lecturing as a primary teaching tool. And I find Mazur's talk informative and interesting and entertaining to watch.