Main Idea and Supporting Details Worksheet
A free, printable main idea worksheet for 2nd to 4th grade. Your child reads a passage, fills in a main idea and details organizer and finds off-topic details. Answer key included.
What's inside
- Page 1: a passage about penguins, then a topic, main idea and details organizer.
- Page 2: choose the main idea for 3 paragraphs and cross out off-topic details.
- Page 3: answer key.
How to use it
- Teach or review the rule first with the main idea and supporting details lesson. It takes about 10 minutes.
- Read the directions for each part out loud. Early readers can point while you read.
- Check Part A together before your child goes on, so any confusion gets fixed early.
- Use the answer key on the last page.
Prints on US Letter paper (8.5 × 11 in). No sign-up needed.
Tips for doing it together
- Keep it short. One page a day is plenty for most young children, and two short sessions beat one long one.
- Let your child read each sentence out loud before answering. Many mistakes get caught by ear.
- Mark a mistake with a small dot instead of an X, and let your child find and fix it. That's where the learning happens.
What your child is practicing
The main idea is what a text is mostly about; supporting details tell more about it. Kids use the too small, too big, just right test to check their main idea.
Practice online
After the worksheet, the 10-question main idea and supporting details quiz gives instant feedback and reads each question aloud. For a game, try Word Slash.
More reading comprehension worksheets
- Fables and their lessons worksheet (2nd–3rd grade)
- Author's purpose worksheet (2nd–4th grade)
- Point of view worksheet (2nd–5th grade)
- Compare and contrast worksheet (2nd–5th grade)
Practice with a game
Free, no sign-up, and they work on phones, tablets and computers.
Reading Rocket
Main Idea MachineLast reviewed: November 11, 2026