Video _should_ take over from lectures, but there needs to be a model to properly replace it. On my part, I think it's an utter waste of the teacher's time to keep repeating the same lecture over and over, when he/she should be doing exactly the conversation and engagement part. It's just we don't have a good, universal model for this. I'm sure lots of places tried and succeeded, but for some reason no particular way of skinning this cat got out to become well known.
Partly, I suspect, is because 80% of the value of education is signaling, so any "revolution in teaching" would be just optimizing the 20% left.
First link is paywalled, and the second is rather unconvincing, and pales in comparison to Caplan's overly careful argumentation.
I suspect we have different lufe experiences as well. For me most education years were either a waste of time, or at least came with very high opportunity costs.
Partly, I suspect, is because 80% of the value of education is signaling, so any "revolution in teaching" would be just optimizing the 20% left.