A synopsis is an overview, or summary, of your essay. It should briefly highlight the main/strongest points/arguments presented. Do not write in the first person as it makes it seem too informal, try to keep the synopsis following the essay - ie. dont mix up the order of things you speak about. Most importantly, do not include anything in the synopsis that you do not speak of in your essay and try not to repeat yourself - ie. don't just cut and paste sections from your essay to make the synopsis - try to be a little more creative. Honestly girl, have you never done a synopsis before? We've always had to complete a synopsis for all essays in all subjects and sometimes even for our speeches! I guess that's why our school always does so well overall in external exams, we have so much practice at writing well...