The lecture content is great! However, it is inconvenient that I have to go to another site to sign up and view the lecture materials. And in the middle of the class, a file suddenly appears and it says it was a file that was already made in a Raspberry Pi class that I didn't even take, so the flow of the class is interrupted. The Raspberry Pi class and the deep learning class are separate classes, so I wish the contents of other lectures weren't mentioned at all. As a student, I want to learn entirely according to the lecture flow, but if I go to a special lecture and then go to another site, I lose focus.