I have 2 A's In chemistry and biology and have mark scheme specific notes for AQA. These notes I created helped me go from D's to A's. I too was a student, I motivated myself and fully understood my topics in order to achieve success. I would aim to teach you topics you may not understand, as well as prepare myself every week for anything you would want to go over. I personally believe understanding Exam style questions are the key to higher grades and have a bank of questions and answers from my own revision period.