When you look over your papers to make sure that you've presented your ideas in ways that are clear to your readers, you send a message that you think your ideas are good enough to deserve a careful presentation.
Writers make changes to their papers at different levels.
Knowing about these levels can help you divide up the job of getting a paper ready to hand in. Read your paper aloud , or have someone read it aloud to you. Leave as much time as you can between finishing writing a paper and editing and proofreading it. This helps you concentrate on sentences and words rather than on the paper's meaning as a whole. Use two pieces of blank white paper to cover all but one sentence at a time.