The main idea is the most important thought or point that an author wants the reader to understand about a text. It tells what the text is mostly about.
The main idea is not just one detail—it is the central message that ties all the details together.
To find the main idea, look for what the text is mostly talking about. Then think about the key details that support that idea.
If you can explain the passage in one clear sentence, you probably found the main idea.
The main idea tells the big picture, while supporting details give facts, reasons, or examples that explain or prove it.
Text: “Rainforests are important. They provide oxygen, homes for animals, and medicines for people.”
Details cannot stand alone—they always connect back to the main idea.
The main idea can be in a single sentence or spread across a longer passage. In longer texts, each paragraph often has its own main idea that supports the overall message.
Look for repeated words and ideas throughout the passage to discover the main idea.
To become better at finding the main idea, practice by reading different texts and summarizing them in one clear sentence.
The more you practice, the easier it will be to see the main idea quickly and clearly.