What Is a Paragraph?

A paragraph is the fundamental unit of written communication. It is a group of related sentences that develop one central idea, topic, or argument. In American English writing, skilled authors choose specific paragraph types to accomplish specific goals — to describe, to tell a story, to explain a process, to persuade, to compare, or to define. Knowing how to identify, read, and write each type makes you a stronger, more flexible communicator.

Choosing the Right Paragraph Type

Skilled writers do not write in one type of paragraph — they move fluidly between types, choosing the one best suited to their purpose at every moment. A great essay might open with a narrative paragraph to hook the reader emotionally, shift to an expository paragraph to provide context, then move through a series of argumentative paragraphs to build its central case, using compare-contrast or cause-effect structures along the way, and close with a descriptive or reflective passage that gives the argument an emotional resonance.

Learning the paragraph types in this guide is not about memorizing categories — it is about building a toolkit. The more fluent you become in all these types, the more choices you have as a writer, and the more precisely you can match your expression to your purpose.

As for the Jane Schaffer method: it is a structure, and like all structures, its value lies not in rigid adherence but in what it teaches. The discipline of labeling your sentences — this is my claim, this is my evidence, this is my analysis — trains a habit of mind that stays with you long after you stop writing the labels. A writer who has internalized Schaffer thinks structurally and analytically by default. That is the real gift of the method.

Write often. Write in many different paragraph types. Write for many different purposes. Each paragraph you write with intention and care makes the next one stronger, faster, and more deeply your own.