i think that writing notes is important but doing questions is even more important. the trick is to finish your notes ASAP and don't spend too much time on them. In the worst case scenario if I don't have time to write notes, i just read through the textbook and highlight, then do multiple choice questions to warm up and then move on to questions and essays. I did this for business studies and economics and it worked pretty well, I don't do science though lol. If you pay attention in class, even if it's just half the time like me, you'll retain some of the content anyways.