Main Idea and Details

Grade 2 · English · Study Guide

Learn how to find the most important idea in a passage and identify the details that support it.

When you read a paragraph or story, you can find two important things: the main idea and the details.

The main idea is the most important point the author wants you to know. It is what the whole paragraph is mostly about. The main idea is often found in the first sentence of a paragraph, but it can also be at the end or in the middle. Sometimes you have to think about all the sentences together and figure out what they all have in common.

Details are small pieces of information that tell more about the main idea. Details help explain, describe, or prove the main idea. They answer questions like who, what, when, where, why, and how. Details are important, but they are not the most important idea — they support it.

A helpful trick is to ask yourself: "What is this MOSTLY about?" The answer to that question is usually the main idea. Then ask: "What facts or examples does the author give?" Those answers are the details.

For example, if a paragraph is about why dogs make great pets, the main idea might be "Dogs are wonderful pets." The details might be that dogs are loyal, playful, and easy to train.

Finding the main idea helps you understand and remember what you read.

Key terms

main idea: The most important point the author wants to share about a topic
details: Facts, examples, or reasons that support and tell more about the main idea
topic: The subject or general idea a paragraph or passage is about
supporting detail: A sentence that gives more information to back up the main idea
author: The person who wrote the text
paragraph: A group of sentences about the same idea, often with one main idea

Flashcards

main idea: The MOST IMPORTANT point — what the whole paragraph is mostly about
details: Facts and examples that SUPPORT the main idea
How to find the main idea: Ask: 'What is this MOSTLY about?' — the answer is the main idea
How to find details: Ask: 'What facts or examples did the author give?' — those are details
Where is the main idea?: Often in the first sentence, but can be anywhere in the paragraph
Do details equal the main idea?: No — details are smaller facts that support the main idea, not replace it
supporting detail: A sentence that helps prove or explain the main idea
Why find the main idea?: It helps you understand and remember what you read

Questions

What is the main idea of a paragraph?
1. A small fact about the topic
2. The most important point the author wants you to know
3. The last sentence only
4. A question the author asks
Show answer
Answer: The most important point the author wants you to know
The main idea is the most important point — it is what the whole paragraph is mostly about.
Details support the main idea by giving more information.
Show answer
Answer: True
Details give more information like facts, examples, and reasons that back up the main idea.
To find the main idea, ask yourself: 'What is this paragraph MOSTLY _______?'
Show answer
Answer: about
Asking 'What is this mostly about?' is a great strategy to identify the main idea of a paragraph.
Read this paragraph: 'Cats are popular pets. They are clean animals. Cats are quiet and easy to care for.' What is the main idea?
1. Cats are clean animals.
2. Cats are quiet.
3. Cats are popular pets.
4. Cats are hard to care for.
Show answer
Answer: Cats are popular pets.
'Cats are popular pets' is the most important, general statement. The other sentences are details that support it.
The main idea is always found in the last sentence of a paragraph.
Show answer
Answer: False
The main idea is most often in the first sentence, but it can appear anywhere in the paragraph.

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