Communicating the central idea of your paper is of utmost importance. Professors will be looking closely to see whether or not the message you have intended has actually been expressed. As Prof. Hart-Nibbrig says, professors like to see that "Writing is clear, has an idea, and the idea is expressed clearly and deals with the ideas discussed in class and in the reading." According to the interviews, this central idea is probably the most important thing that a professor will look for. (The central idea of a paper is also called a thesis.)

While you should try to achieve an academic tone, it is important to remember what your professors really want to assess is your understanding of the topic and your ability to communicate that understanding in clear writing. Always answer the question that is asked. It's always a good idea to repeat key words from the question in your thesis and topic sentences. Never forget that the reader wants you to get to the point. As Prof. Walters says, "Your readers are never going to be convinced if they're confused."