The test result on the physics test encouraged me to focus on definitions of simple concepts and, of course, on a deeper understanding of them. Therefore, I got two new books which will hopefully help. The one I am focusing on right now is the textbook(2nd editions, 2012), as I need it for the lab rapport (it explains everything very well). The second book (the study guide, 2nd edition, 2012) is by one of the authors of the textbook will serve as a revision guide for each chapter. Reading the textbook will be one of the tasks for the summer, although my Extended Essay and my other projects are important as well.