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A.1 Identify the main idea using key details

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What is the main idea?

Main idea is the most important thought or message that an author wants to share in a passage, paragraph, or text. It tells what the text is mostly about.

Examples:
  • Passage: “Dogs can be trained to help people with disabilities. They can guide the blind, alert the deaf, and provide comfort.”
    Main idea: Dogs can help people in many important ways.
  • Passage: “Apples are a healthy snack. They give you vitamins and fiber, and they taste sweet.”
    Main idea: Apples are good for you.
Note

The main idea is like the “big picture.” Details give clues to help you figure it out.

How do you find the main idea?

To find the main idea, ask yourself: “What is this text mostly about?” Then look at the details that support the answer.

Steps:
  • Read the passage carefully.
  • Look for repeated words, ideas, or important facts.
  • Ask: What is the author trying to teach or explain?
  • State the main idea in one clear sentence.
Note

The main idea is usually supported by details, but it is not just one detail—it’s the overall point.

Supporting details

Supporting details are the facts, examples, or descriptions that explain and prove the main idea.

Examples:
  • Main idea: “Bees are important to nature.”
    Supporting details: “They pollinate flowers.” “They help plants grow.” “They produce honey.”
  • Main idea: “Recycling helps the environment.”
    Supporting details: “It reduces waste.” “It saves natural resources.”
Note

Supporting details are like building blocks—they hold up and prove the main idea.

Main idea in nonfiction vs. fiction

In nonfiction, the main idea often explains facts or teaches information. In fiction, the main idea may tell the lesson, theme, or what the story is mostly about.

Examples:
  • Nonfiction passage: “George Washington was the first U.S. president. He led the army in the Revolutionary War. He is known as the ‘Father of Our Country.’”
    Main idea: George Washington was an important leader in American history.
  • Fiction story: “A girl works hard to train her puppy. She learns that patience and practice bring success.”
    Main idea: Hard work and patience lead to success.
Note

Pay attention to whether you are reading a story (fiction) or facts (nonfiction)—the main idea will look different.

Tips for finding the main idea

Use these strategies when reading to help identify the main idea quickly and clearly.

Tips:
  • Look at the title—it often gives a clue to the main idea.
  • Check the first and last sentence—they may state the main idea.
  • Summarize the text in your own words—your summary is usually the main idea.
  • Ignore extra details that do not connect to the “big picture.”
Note

If you can explain the passage in one clear sentence, you have found the main idea.