my rules: listen in class. for me, thats the best way. chemistry: listen, math: listen. thats how i do it, and it worjks for me. you have to find out what type of learner you are, and what your mind is made for. im visual/audible. anything i see or hear i remember. but reading... not so good. my mind is set on math and problem solving. i have high marks in chemistry, math, and physics. french and english... not so good. find how you learn, and use it. also, unlike me, not leaving things to the last minute might help (if you do that)