Obtain the specific requirements for this paper. You need to find out how many words or pages you must write and what topics you can choose from, as well as the formatting rules and deadline(s) for submission.
Plan your essay. After you choose a topic, you must decide on the basic points you wish to cover. An outline is an effective way to lay out your plan in writing. This will help you stay on track with your expository essay. For example, regarding driving too fast, your points could be: 1) "Driving too fast increases your chances of losing control"; 2) "Driving too fast shortens reaction time"; and 3) "More fatalities occur at higher speeds." Keep in mind that your college professor may require you to turn in the outline as well as the paper.
Find factual information to support your position. An expository essay, especially at the college level, is based on facts as opposed to opinions. For this example, cite studies that show an increased chance of accidents or higher levels of fatalities at higher speeds. You can find this information online or in a library.
Write your introduction, which should explain your overall position and the point of view your essay will take. For this example, the position is that driving too fast is dangerous. Once you have completed the introduction, write the rest of your essay, focusing on each main point from your outline. Each main point should require no more than two paragraphs, for example, one paragraph on lower reaction times and another on the higher likelihood of losing control of the vehicle. Finish the essay with a summary of your position and the points you made, along with any other information you feel is necessary.