I am a big advocate for learning through completing questions especially for STEM subjects where you need to be apply knowledge to different contexts in order to understand it. At the start of each session, we would make sure the content from the previous lesson was fully understood and any questions you may still have have been thoroughly answered. Then, we could go through a topic you are struggling with and complete relevant worksheets and questions together, making sure you have a good grasp on the concepts needed to be able to answer each question. This will mean that you will learn how to correctly write out your answers so that in an exam you would get the marks and also understand how to get there too.