A paragraph is still a fairly short kind of communication, however. If you have a lot more to say, one paragraph will not be enough. Groups of paragraphs may be required. A group of paragraphs, all sharing a common theme or topic, written so that one paragraph leads into the next, is called a composition or an essay. Essays can be narrative, descriptive, or expository, in exactly the same way as paragraphs can. In Writing Paragraphs, you investigated the writing strategies and techniques required to create a one-paragraph essay. In this module, you will see how these same methods are used to create longer essays.