The document provides instructions for writing an essay in 3-4 sentences. It begins by explaining that an essay expresses an idea or claim and supports it with evidence. It then outlines the typical structure of an essay, including an introduction to interest the reader and introduce the topic and thesis, 3 paragraphs in the body to support the thesis with evidence, and a conclusion to summarize the main points and restate the thesis. Transition words are suggested to link the paragraphs together logically.