This document discusses topic sentences and concluding sentences in paragraphs. It explains that a topic sentence has two parts: a topic and controlling idea. It provides examples of different types of topic sentences. The document also discusses the purpose of concluding sentences, which is to close the paragraph in a way that does not leave the reader expecting more. It notes there are three main types of concluding sentences: ones that restate the topic sentence, ones that summarize the main points, and ones that include a personal comment. Finally, the document shows an example outline format for organizing a paragraph with a topic sentence, three supporting points, and a concluding sentence.