For pure lectures (no real discussion, just the lecturer speaking for a long time) in courses where there are good written materials covering the same content and presence at the lectures is not required, don't bother going to the lectures if they don't feel obviously valuable. Self-study from the written materials is likely to be a more effective use of your time; lectures are generally a terrible format.
lectures are generally a terrible format.
I used to think this, but I now suspect that this is mostly just for "our kind." The failure of online education to replace traditional lectures might be because typical college students gets something significant out of live performances. It's also probably related to why video conferencing hasn't replaced live conferences.