we can now deliver on-demand content to any student for nearly zero incremental cost. The video content can be paused and repeated as needed. Content producers can get real-time data on use, including student attention and efficacy. Students can focus on exactly what they need to know. They don't have to be embarrassed to fill in remedial gaps. They don't need to take notes. Crucially, the lectures can be given by superb communicators, with a deep, intuitive understanding of the material.
Why aren't students watching lectures on their own, at their own pace, in their dorms? Why aren't we using the 300-person gathering at 10 a.m. every Tuesday and Thursday as an opportunity for active peer-to-peer instruction rather than a passive, one-size-fits-all lecture?
The only argument I've seen made in favor of the 30- to 300-person lecture today is that it gives students an opportunity to ask questions of a live professor. The reality, however, is that the great majority of students are too self-conscious or considerate of their peers' time to raise their hands. Those who are bold enough to do so are often more likely to derail the professor's pacing than to ask something relevant to more than 5 or 10 percent of the students in the room. With on-demand video, however, the very act of watching a 10-minute video is equivalent to the student's saying, "I don't understand this, tell me more about it" without fear of being judged by peers or the professor, or of wasting everyone's time. Being able to directly learn from the professor actually becomes much more likely when the lecture happens on the student's own time, with on-demand video. Then the professor is freed to be an active participant in an interactive, peer-to-peer problem-solving powwow in the classroom.