This is a vast improvement over online lectures with no interactivity, and addresses several concerns over the “online lecture”-ification of classes as well as flipped classrooms: specifically, students cannot ask questions in real-time, and hence there is no personalization of the lecture, and no ability to go on interesting tangents. However, neither does in-person lecture accomplish this completely because there are too many people and one instructor. Now students get to ask ALL their questions, in a time-specific manner, and a teacher can address them during class (or by commenting on the questions). This also provides the instructor with very specific feedback to improve the online lecture.