information request

Hello, my name is Josh Griffith and I am a student at Texas State University. I am righting a paper on how to improve the effectiveness of MOOCs and related learning programs. The main focus of the paper will be on how video lectures and resources such as chat features and linked quizzes can be organized to improve their clarity and accessibility for students. I would like any data you can give me on how the format of video lectures can change the comprehension of the students that watch these videos or on the effect that any related material has on student learning.  hope to hear from you soon.