1. Students can't raise their hands during a video lecture and say, "Wait, I didn't get that." Pressing the rewind button will not always work in this situation.
and
2. People seem to be jumping into this method without any solid evidence for its effectiveness.
Some flipped classrooms expect students to watch Khan Academy videos at home. I've read that the genesis of Khan Academy is that Salman Khan used to tutor nephews and nieces over the phone, created videos to supplement his phone lessons, and found that his nephews preferred the videos because they could rewind them.
Is a "flipped classroom" really a novel concept? In high school English classes, we discussed books we were expected to read at home. This also happens on college humanities seminars. Of course, the problem with this method is that students often fail to do their reading. A justification for the lecture format is that it is the only way to ensure that recalcitrant students are exposed to the material.
