Often I feel like sitting in class is pointless. Some stuff I already know from reading the book and the stuff I don't know is done too fast for me to learn anything from it. I need to look over examples and new material multiple times before getting it. Video lectures like the ones from MIT for instance are perfect, because I can watch certain parts again and again. I can't do that in real life and it feels like going to class is just wasting my time mostly. Does anyone recognize this?