Explaining the concepts that you just learned to someone forces you to structure your thoughts in a coherent and systematic way with the hope that you will be understood. This is already a good preparation for the examination. You need to solidify the structure of your thoughts about the concepts you have learned so come examination time, you are more or less ready to answer the questions. If you can’t find someone, do it yourself in front of a mirror. Alternatively, you can create a PowerPoint presentation of not more than ten (10) slides to every topic you have learned. This will force you to extract the main and important concepts from the topic.