>>12797509Only directly copy down things like formulae from the board. Everything else should be rewritten in your own words, and if possible come up with another way to explain it. Spend your time in class looking at and thinking about what the professor is writing or saying, instead of blindly copying it down. This forces you to ask questions when you are confused, since otherwise you might get left behind, and to actually understand the material, since understanding is necessary to generate new explanations.