I’m a graduate student and a teaching assistant at a large state university. As a TA, I teach two discussion sections of around 20 undergrad students each for an introductory humanities class. The course is online because of COVID, and the students watch two asynchronous lectures recorded by the professor-of-record per week, and they attend one synchronous discussion section with me and their 20 or so classmates on Zoom.
Source: Distance learning: Should students be required to keep cameras on?