Main idea of a short academic text (SAT)

Reading Comprehension

CCSS RI.11-12.2CCSS RL.11-12.2England: SAT Reading and Writing (Central Ideas and Details)England: ACT Reading

Objective and success criteria

Students will: Main idea of a short academic text (SAT).

I can answer questions on today's skill on my own, without help.
I can explain each step and say why it works.
I can check my answer and spot a mistake.

Before and after

Needs first: Central ideas in complex texts; Why did the author include this detail?

Leads to: the next skill in this area.

Materials: A short text or extract (one copy each), Highlighters, Question cards, Mini whiteboards, A short model text on the board, Printed student sheet (below).

Warm-up · 4 min

Quick retrieval from earlier learning (Central ideas in complex texts; Why did the author include this detail?). Students answer on mini whiteboards.
Show answers together and note who needs support in the main task.

Is the proposed answer correct? Scientists studying the Arctic fox noticed something odd: one fox had walked more than 3,500 kilometres in 76 days, from Norway to Canada. What is the main purpose of the specific figures? → to compare Norway and Canada (yes, it is correct / no, it is not correct) → no, it is not correctPrompt: Ask: what would be lost if this detail were removed?
The invention of refrigerated shipping in the late 1800s did more than keep food fresh. It allowed meat from Argentina and New Zealand to reach European tables, reshaping farming, trade and diets across continents. Which choice best states the central idea? (Food spoils without refrigeration. / Ships were slow in the 1800s. / Refrigerated shipping had wide-reaching effects on global trade and food. / Argentina produces meat.) → Refrigerated shipping had wide-reaching effects on global trade and food.Prompt: What is the WHOLE text mostly about, not just one part?
Is the proposed answer correct? The company advertises its trainers as 'built to last'. Our tests found that the soles of three out of five pairs had split within two months. Why does the writer quote the slogan 'built to last'? → to describe the trainers' design (yes, it is correct / no, it is not correct) → no, it is not correctPrompt: Ask: what would be lost if this detail were removed?

Hook · 3 min

Read the first lines of a short text aloud and ask what students predict will happen and why.
Share the objective: Main idea of a short academic text (SAT). Read the success criteria together.

I do: model it · 7 min

Work through the example out loud, saying why you do each step, not just what you do.
Example: For decades, researchers assumed that octopuses, being solitary, had little need for complex social behaviour. However, divers off the coast of Australia have recorded groups of gloomy octopuses living together, sharing dens and even signalling to one another by changing colour. These observations suggest that octopus social life may be richer than once believed. Which choice best states the main idea of the text?
Step 1: The main idea is the central claim the whole text supports; details are evidence for it.
Step 2: The text sets up an old assumption and presents evidence against it.
Step 3: So the answer is: New observations challenge the view that octopuses have little social behaviour.
Answer: New observations challenge the view that octopuses have little social behaviour.
Pause after each step and ask a student to say what comes next.

We do: guided practice · 6 min

Do these together. Students try each step on whiteboards before you reveal it.
Use the hints as prompts rather than giving the answer.

Many people believe that the 'five-second rule' protects food dropped on the floor. In an experiment, scientists dropped foods onto surfaces contaminated with bacteria and measured how much transferred. Bacteria reached wet foods like watermelon in under a second, though dry foods such as sweets picked up fewer bacteria over time. Which choice best states the main idea of the text? (Watermelon is healthier than sweets. / Floors are always clean enough to eat from. / An experiment shows bacteria can transfer to dropped food almost instantly, especially to wet foods. / Scientists enjoy dropping food.) → An experiment shows bacteria can transfer to dropped food almost instantly, especially to wet foods.Prompt: Which choice covers the WHOLE text, not just one detail?
Some species of trees share nutrients through underground networks of fungi. Through these networks, larger trees can pass sugars to young seedlings growing in the shade. Which choice best states the main idea of the text? (Seedlings prefer the shade. / Trees can share nutrients with each other through fungal networks. / Fungi are a type of tree. / Sugar is bad for trees.) → Trees can share nutrients with each other through fungal networks.Prompt: What is the text mostly about?

You do: independent practice · 7 min

Students work on the student sheet. Circulate and check the first two answers of every student early.
Students who finish: write a question of their own for a partner, with the answer.

The 6 questions are on the student sheet below, with answers in the key.

Exit ticket · 3 min

Two questions on their own. Sort answers into got it / nearly / not yet to plan the next lesson.

In many cities, the hottest neighbourhoods are those with the fewest trees and the most paved surfaces. Researchers in several countries have found that planting street trees and adding green roofs can lower local summer temperatures by several degrees, reducing health risks during heatwaves. Which choice best states the main idea of the text? (Heatwaves only happen in large cities. / Green roofs are difficult to build. / Adding greenery to cities can cool hot neighbourhoods and reduce heat-related risks. / Paved surfaces are cheaper than trees.) → Adding greenery to cities can cool hot neighbourhoods and reduce heat-related risks.Prompt: Which choice covers the WHOLE text, not just one detail?
Before the printing press, books were copied by hand, which could take months. Printing made books far cheaper and faster to produce, helping ideas spread across Europe. Which choice best states the main idea of the text? (Books took months to read. / The printing press made books cheaper and helped ideas spread. / Europe had few books. / Copying by hand was a popular hobby.) → The printing press made books cheaper and helped ideas spread.Prompt: What is the text mostly about?

Watch out for

Answering from memory or opinion instead of evidence in the text.
Copying a long quote without explaining what it shows.

Support and stretch

Support

Review first: Central ideas in complex texts.
Use concrete materials: a short text or extract (one copy each).
Give the first step of each question, or a partly worked example to finish.
Pair with a confident partner for the guided practice.

Stretch

Explain a common mistake in writing and how to fix it.
Write a word problem that uses today's skill, then solve a partner's.

Homework and more practice

Free online practice with hints and printable worksheets for this skill: eurekami.com/english/grade-11.

Free lesson plan from eurekami.com/lesson-plan-builder

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Main idea of a short academic text (SAT)

Name

Date

Score/ 6

1
Question 1
In many cities, the hottest neighbourhoods are those with the fewest trees and the most paved surfaces. Researchers in several countries have found that planting street trees and adding green roofs can lower local summer temperatures by several degrees, reducing health risks during heatwaves. Which choice best states the main idea of the text?
- A. Heatwaves only happen in large cities.
- B. Paved surfaces are cheaper than trees.
- C. Green roofs are difficult to build.
- D. Adding greenery to cities can cool hot neighbourhoods and reduce heat-related risks.

Two Views on AI and Art

Text 1. When photography was invented, some painters declared that art was dead. Instead, painting changed: freed from the need to record reality, artists explored colour, emotion and abstraction. Image-generating AI may play a similar role. Used as a tool, it can help people sketch ideas quickly, test compositions and bring visual thinking to those who never trained as artists. The question is not whether AI will end art, but what new kinds of art people will make with it. Text 2. Comparisons with photography are tempting but misleading. A camera records the world; many AI image tools are trained on millions of existing artworks, often without their creators' permission or payment. Until artists can choose whether their work is used, and are fairly credited, it is hard to call this simply a new tool. The problem is not the technology itself but the way it has been built.

2
Question 2
Read "Two Views on AI and Art". Which choice best states the main idea of Text 1?
- A. Photography destroyed painting.
- B. Only trained artists should make images.
- C. AI will soon replace all artists.
- D. Like photography, AI may change art rather than end it, acting as a new creative tool.

Beavers Come Home

Four hundred years after they were hunted to extinction in Britain, beavers are back. Small populations now live wild in parts of Scotland and England, and several other European countries have reintroduced them too. Ecologists describe beavers as "ecosystem engineers". By building dams, they create ponds and wetlands that slow the flow of water, trap sediment and provide homes for insects, amphibians and birds. In one Devon study, the amount of water flowing downstream during heavy rain was noticeably lower below beaver dams than above them, suggesting that dams can help reduce flooding. Not everyone is delighted. Some farmers report flooded fields and felled trees, and they worry about the cost. Their concerns are real, and schemes in some areas now compensate landowners or move beavers whose dams cause serious damage. Supporters argue that the benefits outweigh the costs. Wetlands created by beavers can store water during droughts, improve water quality and attract visitors. Yet researchers caution that results vary from river to river, and long-term data are still limited. What is clear is that the return of beavers forces us to ask a broader question: how much room are we willing to make for wild animals in a crowded country?

3
Question 3
Read "Beavers Come Home". Which choice best states the main idea of the text?
- A. Reintroduced beavers bring environmental benefits but also costs, and the full picture is still being studied.
- B. Beavers only live in Scotland.
- C. Beavers should be removed from Britain again.
- D. Farmers are always opposed to wildlife.

4
Question 4
The composer Florence Price became the first Black woman to have a symphony performed by a major American orchestra, in 1933. Her music blended European classical forms with African American spirituals. Which choice best states the main idea of the text?
- A. Symphonies are very long.
- B. Orchestras only played European music.
- C. Florence Price was a famous singer.
- D. Florence Price was a groundbreaking composer who combined different musical traditions.
5
Question 5
For decades, researchers assumed that octopuses, being solitary, had little need for complex social behaviour. However, divers off the coast of Australia have recorded groups of gloomy octopuses living together, sharing dens and even signalling to one another by changing colour. These observations suggest that octopus social life may be richer than once believed. Which choice best states the main idea of the text?
- A. Octopuses change colour to hide from predators.
- B. Australia has more octopuses than any other country.
- C. Divers have discovered a new species of octopus.
- D. New observations challenge the view that octopuses have little social behaviour.
6
Question 6
Some species of trees share nutrients through underground networks of fungi. Through these networks, larger trees can pass sugars to young seedlings growing in the shade. Which choice best states the main idea of the text?
- A. Seedlings prefer the shade.
- B. Fungi are a type of tree.
- C. Trees can share nutrients with each other through fungal networks.
- D. Sugar is bad for trees.

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Answer key: Main idea of a short academic text (SAT)

1. D. Adding greenery to cities can cool hot neighbourhoods and reduce heat-related risks.
2. D. Like photography, AI may change art rather than end it, acting as a new creative tool.
3. A. Reintroduced beavers bring environmental benefits but also costs, and the full picture is still being studied.
4. D. Florence Price was a groundbreaking composer who combined different musical traditions.
5. D. New observations challenge the view that octopuses have little social behaviour.
6. C. Trees can share nutrients with each other through fungal networks.