Support your paragraphs with specific examples. Your first paragraph should explain your purpose in sending the letter and give an overview of what the letter is about. Do not refer, however, to the fact that this is a class assignment. Each body paragraph should cover a separate major point. A brief concluding paragraph should wrap up your recommendations.
Style Use direct, efficient, factual style.
Avoid deliberately elaborate language, but don't use pidgin English, either. See Lannon, Chapter 13, pp. 261-304, for excellent advice on style. And put all of the address and signature material flush left. Use underlined headings to visually organize the different main sections of your letter.