The best way for you is to prepare your own notes immediately. While making notes, memorize it well and understand whatever you write. This will help you reduce double writing work as these notes can also be used for your upcoming exams and you will learn whatever you write. Do not buttify anyrhing just before the exam. This will not help you. Instead will make you forget or confuse the things that you know. Hence, drop this idea. If you have any games periods, bunk all of them and use them to do your homework or to study. But just use one class to play. "All work and no play makes jack a dull boy." So, don't worry! You will do well! All the best!