be organized with your notes! I suggest getting a binder for each subject and keeping every single paper handed out by your teacher, it will really help. biology is not hard, but there is a lot of things to know, and if you're organized you'll be fine. chemistry is a bit more difficult, but if you make a formula sheet for every equation and formula you get over the two years, your work will be cut in half as you're studying for you exam, as does paying attention in class.. take care, and find something you like in each subject, it will be a lot less difficult!
a straight 7 HL chemistry and bio student