Author's Purpose — Identify the author's purpose (inform, persuade, entertain, explain).

Historical Context & Motivation

People have been writing for thousands of years. But have you ever stopped to ask, "Why did this person write this?" That question is at the heart of what we call author's purpose — the reason an author creates a piece of writing. Understanding purpose helps you figure out what a passage really means.

The idea of studying why people write goes back to ancient Greece. Philosophers like Aristotle noticed that speakers and writers always had a goal. Over the centuries, teachers and scholars built a system for grouping those goals. Today, this system is a key reading skill on tests like the SHSAT.

So the big question this lesson answers is simple: How do you figure out why an author wrote something? Once you know how, reading passages on the SHSAT becomes much easier.

Core Principles & Definitions

Every time an author sits down to write, they have a reason. That reason falls into one of four main categories. Think of these categories as the four "jobs" a piece of writing can do. Learning to recognize which job a passage is doing is the key skill you need.

You might notice that "inform" and "explain" seem similar. Here is the difference: writing that informs gives you facts (what happened), while writing that explains shows you a process (how or why it happened). Keep that distinction in mind for the SHSAT.

Visual Explanation — The Purpose Compass

The diagram below shows the four purposes arranged like a compass. Each purpose has its own set of signal words (clue words that tell you what the author is trying to do). When you spot these signals in a passage, they point you toward the correct purpose.

When you read a SHSAT passage, imagine you are holding this compass. Ask yourself: Does the passage give me facts? Does it try to convince me of something? Does it tell a story to keep me interested? Or does it teach me how something works? The signal words will guide you to the answer.

How It Works — The PIE-E Strategy

A handy way to remember the four purposes is the acronym PIE-E: Persuade, Inform, Entertain, Explain. Think of it like eating a slice of pie — each bite gives you a different flavor, just like each purpose gives writing a different feel.

The Three-Step Detection Method

Here is a simple method you can use every time you read a passage on the SHSAT.

1. Step 1 — Read the first and last paragraphs carefully. Authors usually show their purpose most clearly at the beginning and end of a passage.
2. Step 2 — Look for signal words and tone. Is the language neutral (inform), emotional or opinionated (persuade), creative and fun (entertain), or step-by-step (explain)?
3. Step 3 — Ask: What does the author want me to DO after reading? Learn a fact? Change my mind? Enjoy a story? Understand a process?

Detailed Breakdown — Signal Words & Text Features

Now let's dive deeper into each purpose. The table below lists the signal words, typical text features (things like headings, images, and formatting), and the tone (the overall feeling of the writing) for each purpose. Study this chart — it is one of your best tools on test day.

Notice that tone is one of the most powerful clues. If a passage feels neutral and is full of facts, it is probably informing. If the language is strong and emotional, the author is likely persuading. Creative and vivid language means entertaining. A step-by-step pattern means explaining.

Worked Example — Finding Purpose in a Passage

Let's practice with a short passage. Read it carefully, then follow our three-step method.

Did you notice that the passage also informs us about sea turtles? That's okay. Remember, a passage can have more than one purpose. But the primary purpose is to persuade because the entire passage is built around getting you to take action.

Comparing the Four Purposes

One tricky part of author's purpose questions is telling similar purposes apart. Let's compare the four purposes side by side, looking at their strengths and the common mistakes students make.

Connection to Advanced Reading Skills

Author's purpose is a foundational skill, but it connects to more advanced reading concepts you will use in high school and beyond. Understanding purpose now will make these harder skills easier later.

Think of author's purpose as the first floor of a building. You need a strong first floor before you can build higher. Every time you practice identifying purpose, you are strengthening the foundation for the more complex reading skills you will need in high school English classes and on future exams.

Practice Problems

Try these five problems on your own. Read each passage or question carefully, then use the three-step method. Check your answers after each one.

Lesson Summary