Colleges are experimenting with making online teaching videos featuring AI avatar versions of professors. Some students find the simulated likenesses of their instructors a bit creepy, but proponents say the technology could be key to making college courses more active and human. The idea is that AI will make it easy to make personalized teaching videos so that more teachers can adopt a “flipped classroom” approach — where students watch video lecturers as homework so class time is spent on discussion or projects.