Please find below some resources which may help you with your studies.
Quantitative Easing is an important part of modern monetary policy, but one which students struggle to grasp.
These slides help explain what you need to know and also give you some questions and exercises to check your understanding.
Philosophy, Politics and Economics is a very popular course for students who have broad interests in some fundamental questions. These slides, focusing on the course at Oxford, give an overview of what it involves, how competitive it is, what you can expect if you apply and are successful, and how best to prepare.