Dig down under the surface and analyze details. In general, you should state your point in a sentence, the proof in a sentence or two, and then give your explanation in several sentences. When you submit your essay, include at least your earliest draft and your final version. If I've made comments on any of these drafts, include them. That way we can analyze your writing process together.
Word processors catch most spelling mistakes and typos and make revision painless.
After you are satisfied with the content of your essay, edit your essay for grammar and style. It's hard enough to write a good essay without working against yourself. Otherwise it won't earn a passing grade. Put your name, my name, and the date in the upper right-hand corner. It might happen that way . . .