Organize and develop your writing in sections and subsections--sometimes referred to as chunks. A section is a distinct part or chunk of a body of material. Sections and subsections may be one or more paragraphs long. The material in a section fits together under a topic, which is usually identified by a subject heading or subheading. By developing sections and subsections, you help the reader see how the material develops and make it easier for the reader to move around in the document. The sectioning or chunking strategy is one of the most effective means a writer has to make his or her material more readable.
See also Outlining.