A. Literacy Connections and Applications / C. Comprehension: Understanding and Responding to Texts · Understanding and Responding to TextsMain Idea, Supporting Details, Sequence and Comparing
C2.6 C3.3About 40 minutes
Learning goals- I can find the main idea of a simple text.
- I can find the supporting details that tell more about the main idea.
- I can retell important details in the right order (sequence).
- I can write a short summary.
- I can compare and contrast two texts.
Words to know
main idea
What a text is mostly about: the most important idea.
supporting details
Facts or examples that tell more about the main idea and prove it.
sequence
The order in which things happen.
summary
A short retelling of only the most important ideas, in your own words.
compare
To tell how things are the same.
contrast
To tell how things are different.
Venn diagram
Two overlapping circles used to compare. The middle shows what is the same.
Remember from Grade 2
In Grade 2 you found the main idea and important details, retold stories in order, and compared texts.
In Grade 3 you will find the main idea even when it is not said in one sentence, pick the details that really support it, write short summaries, and analyze how two texts are alike and different.
Hook: The tabletop
Think of a table. The tabletop is the main idea. The legs are the supporting details. Without the legs, the tabletop falls down! Without supporting details, the main idea is just a guess.
Read: Snow Is a Warm Blanket
It sounds strange, but snow helps keep living things warm in winter!
Snow is full of tiny pockets of air. The air stops heat from escaping, so the ground under deep snow stays much warmer than the cold air above.
Small animals such as mice and voles live in tunnels under the snow all winter. There, they are safe from the freezing wind, and they can find seeds and roots to eat.
Plants are protected too. A thick layer of snow keeps their roots from freezing too hard.
So the next time you see a big snowbank, remember: there might be a whole cozy world underneath!
Worked exampleLet's find the main idea and supporting details
What is the main idea of Snow Is a Warm Blanket? Which details support it?
- Ask: What is the whole text mostly about? Every paragraph is about snow helping living things stay warm or safe.
- Check the title: Snow Is a Warm Blanket. A blanket keeps you warm. That's a big clue!
- Main idea: Snow helps keep living things warm and safe in winter.
- Supporting detail 1: Snow has air pockets that keep heat in, so the ground stays warmer.
- Supporting detail 2: Mice and voles live in tunnels under the snow, safe from the wind.
- Supporting detail 3: Snow protects plants' roots from freezing too hard.
- Is there might be a whole cozy world underneath a supporting detail? It is a fun ending, but it doesn't add a new fact. It's not one of the most important details.
Main idea: Snow helps keep living things warm and safe in winter. Supporting details: air pockets keep heat in; mice and voles live safely under the snow; plant roots are protected.
Sequence and summaries for stories
For stories, the important details are the events, in order. Use sequence words: first, next, then, after that, finally.
A summary is short: just the most important parts, in your own words. One way to summarize a story is:
Somebody (who?) ... wanted (what?) ... but (problem) ... so (what they did) ... then (how it ended).
Read: The Wobbly Volcano
Zara had one week to make a project for the science fair. She decided to build a volcano that would bubble over with baking soda and vinegar.
First, she shaped the volcano out of play dough around a small plastic bottle. Next, she painted it brown and grey. But on the night before the fair, the volcano tipped over and cracked in half!
Zara almost cried. Then she had an idea. She asked her brother to help her glue the volcano onto a sturdy piece of cardboard so it couldn't tip. They fixed the crack with more play dough.
At the fair, Zara poured in the vinegar. Fizz! Bubble! Foam poured down the sides. A crowd of kids clapped. Zara grinned. Her wobbly volcano was the bubbliest one at the fair!
Worked exampleLet's sequence and summarize
Put the important events of The Wobbly Volcano in order, then write a summary.
- First: Zara builds a volcano from play dough around a bottle.
- Next: She paints it.
- Then: The night before the fair, it tips over and cracks.
- After that: Zara and her brother glue it to cardboard and fix the crack.
- Finally: At the fair, the volcano bubbles over and kids clap.
- Summary (Somebody-Wanted-But-So-Then): Zara wanted to make a volcano for the science fair, but it tipped over and cracked the night before. So she and her brother glued it to cardboard and fixed it. Then it bubbled over at the fair and everyone clapped.
The summary is only 3 sentences and tells the most important events in order. It leaves out small details like the paint colours.
The important events of The Wobbly Volcano in sequence. Sequence words (first, next, then, after that, finally) keep the events in order.Compare and contrast two texts
When you compare, you find what is the same. When you contrast, you find what is different. Read these two short texts.
Text A (story): Snowy's First Winter
Snowy the owl fluffed her white feathers. "It's too dark up here in the North," she grumbled. "I've eaten lemmings all summer. Now I'm flying south to find some mice and a little sunshine!" And off she flew, all the way to a farm field near Kingston.
Text B (fact text): Snowy Owls
Body: Snowy owls have thick white feathers. Males are whiter than females.
Food: They eat mostly small animals called lemmings.
Winter: Snowy owls nest in the Arctic. In some winters, many fly south, and people can spot them in open fields in southern Canada, where they hunt mice and voles.
| Text A: Snowy's First Winter | Text B: Snowy Owls |
|---|
| Literary or informational? | Literary (a story) | Informational (facts) |
| Can the owl talk? | Yes (made up) | No |
| Features | Character, dialogue, a little plot | Headings (Body, Food, Winter), facts |
| Same ideas | White feathers, eats lemmings, flies south | White feathers, eats lemmings, flies south |
Just for funWhat did Zara's volcano say to the baking soda?
I lava you!
Words for comparing
Same: both, also, too, alike, the same as
Different: but, however, while, unlike, instead
Example: Both texts tell that snowy owls eat lemmings, but only the story has an owl that talks.
Hands-on activityMain idea table and summary strip
You need: a paper plate (or circle of paper), 4 craft sticks or paper strips, tape, a book or article.
- Read a short nonfiction text with a grown-up (a page from a library book or a kids' news article).
- Write the main idea on the plate (the tabletop).
- Write one supporting detail on each stick (the legs). Tape the legs under the plate. Can your table "stand" with strong details?
- Now read a short story. Fold a strip of paper into 5 boxes. Draw and write the events in sequence: first, next, then, after that, finally.
- Say a summary in 3 sentences or fewer.
Your turn
1What is the main idea of Snow Is a Warm Blanket?
Snow helps keep living things warm and safe in winter.
2Give one supporting detail from Snow Is a Warm Blanket.
Any one: snow has air pockets that keep heat in; mice and voles live safely in tunnels under the snow; snow protects plant roots from freezing too hard.
3What happened to Zara's volcano the night before the fair?
It tipped over and cracked in half.
4Put in order: A. Zara paints the volcano. B. The volcano bubbles at the fair. C. Zara shapes the volcano from play dough.
5How are Text A and Text B the same? Give one way.
Both are about snowy owls; both say they have white feathers, eat lemmings and fly south. (Any one.)
6How are Text A and Text B different? Give one way.
Text A is a made-up story with a talking owl; Text B is true facts with headings. (Any one.)
A short retelling of only the most important ideas, in your own words.
More practice: warm-up
1In the tabletop picture, what are the legs?
2What two things did Zara mix to make her volcano bubble?
3What do snowy owls mostly eat?
4Which word shows something is different: both or but?
5Who helped Zara fix her volcano?
More practice: on your own
1Is this a good main idea for the snow text? Voles live under the snow. Why or why not?
No. It is only one detail. The text is also about the air pockets and plants. The main idea must cover the whole text.
2Which detail would you leave out of a summary of The Wobbly Volcano: the volcano cracked or she painted it brown and grey? Why?
Leave out the paint colours. They are a small detail; the crack is the problem, which is important.
3Write a one-sentence comparison of Text A and Text B using both and but.
Example: Both texts say snowy owls fly south, but only Text A has an owl who talks.
4What was the problem in The Wobbly Volcano and how was it solved?
Problem: the volcano tipped over and cracked. Solution: Zara and her brother glued it to sturdy cardboard and fixed the crack with more play dough.
5Which text would you use for a school project on snowy owls? Why?
Text B, because it gives true facts organized under headings. Text A is made up (owls don't talk).
Challenge
1Write a 2- or 3-sentence summary of Snow Is a Warm Blanket.
Example: Snow keeps living things warm in winter because its air pockets hold in heat. Mice and voles live safely in tunnels under it, and it protects plant roots. Look for the main idea plus the most important details, in your own words.
2The main idea of the snow text is never said in exactly one sentence. How did you figure it out?
By asking what every paragraph is about (snow helping living things stay warm and safe) and using the title as a clue. All the details point to the same big idea.
3What fact from Text B does Text A also show, even though Text A is a made-up story?
Text A shows that snowy owls fly south in some winters, eat lemmings and have white feathers, which are true facts from Text B. (Bonus: Text A says it's dark in the North; Arctic winters do have very short days.)
Quiz
2. Which is a supporting detail for the main idea Snow helps living things in winter?
3. Which words are sequence words?
5. In a Venn diagram, what goes in the middle where the circles overlap?
6. How is Snowy's First Winter different from Snowy Owls?
What this lesson teaches: Grade 3 students identify the main idea in a simple text and relate important details in sequence (C2.6), and analyze literary and informational texts by identifying main and supporting ideas, sequencing information and comparing and contrasting elements (C3.3).
How to help at home:
- After reading, ask: "What was it mostly about?" Then: "What did the writer tell us to prove that?"
- Practise summaries out loud with movies and TV episodes: "Tell me in three sentences."
- Read a fiction and nonfiction book on the same topic (e.g. a bear story and a bear fact book) and compare them.
Common difficulties:
- Main idea too narrow (one detail) or too broad ("it's about snow"). Try: "Snow + what about snow?"
- Summaries that retell everything. Set a limit: three sentences.
- Comparing only the topics. Push to compare forms and features too (talking animals vs. headings).
Safety: If your child tries the baking soda volcano, do it on a tray with a grown-up and keep vinegar away from eyes.