I am currently a student at UCSC, and many students in my position find that class sizes are becoming unbearably big. There is no time for the teacher to stop and answer everyone's questions, or have a discussion in class. It is almost the same as watching a video lecture on youtube. We allow for students to ask questions real time, the questions aggregate on a live feed and the teacher can see the top questions people had, and, without stopping rhythm can answer those questions. The teacher can also ask questions and can view the answers that everyone chooses for a real time analytic on how everyone is doing on average, rather than a small random sample that they would get asking questions in class.