Comparing Two Texts on One Topic

When we read two books or passages about the same subject, we look at what is the same and what is different between them.

Reading is good — doing is better. Practice Comparing Two Texts on One Topic as an interactive lesson.

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Definition

Comparing two texts on one topic means reading two different books, articles, or passages that are both about the same subject, then thinking about how the information, details, words, or ideas in each one are alike and how they are different.

Remember the rule

Same topic, different lens! Ask: What did BOTH say? What did ONLY ONE say?

Key words

topic: The main subject that both texts are about, like frogs or volcanoes.
compare: To look at two things and find out how they are the same.
contrast: To look at two things and find out how they are different.
text: Any piece of writing, like a book, article, or passage.
detail: A small piece of information that tells you more about the topic.
author: The person who wrote the text.
main idea: The most important point the author wants you to know about the topic.
both: A word that means something is true for Text 1 AND Text 2 at the same time.

Worked examples

Book A about penguins says they live in Antarctica and swim to catch fish. Book B about penguins says they live in cold places and cannot fly. What do both books tell us?

→ Both books tell us that penguins live in cold places. That detail appears in both texts. · When something shows up in both texts, that is a similarity.

Book A about penguins talks about what penguins eat. Book B about penguins does NOT mention food at all. What does that tell us?

→ Only Book A gives us information about penguin food. That is a difference between the two texts. · When one text has a detail the other does not, that is a difference.

Article 1 about rain says water falls from clouds when they get too heavy. Article 2 about rain says rain helps plants grow. How are these two articles different?

→ Article 1 focuses on how rain happens, while Article 2 focuses on why rain is important for plants. They cover different parts of the same topic.

Story 1 about bees says bees make honey and live in hives. Story 2 about bees says bees make honey and help flowers grow. What is the same?

→ Both stories say that bees make honey. That is the similarity between the two texts.

You read two passages about the sun. Passage 1 uses the word 'enormous' and lots of science facts. Passage 2 tells a fun story about a child playing in the sunshine. How are these two texts different?

→ Passage 1 gives science information about the sun, and Passage 2 tells a story. One is nonfiction and one is more like a story, even though the topic is the same. · Two texts on the same topic can be written in very different ways.

Common mistakes

Thinking that because two texts are about the same topic they must say the exact same things — they can cover very different details.
Forgetting to read BOTH texts carefully before comparing — kids sometimes only remember what they just read and forget the first text.
Only finding differences and forgetting to look for things that are the same, or the other way around.
Writing 'they are both about penguins' as the only similarity — that is the topic, not a detail. Try to find a real fact both texts share.
Mixing up details from Text 1 and Text 2 — always go back and check which book said which thing.

FAQs

Do both texts have to be the same type, like both books or both articles?

No! You can compare a nonfiction article with a story, or a poem with a book chapter, as long as they are both about the same topic.

How do I keep track of what each text says?

Try a simple T-chart or Venn diagram. Write Text 1 on one side and Text 2 on the other, and jot down the key details from each as you read.

What if the two texts say opposite things about the topic?

That is a great difference to notice! Write down what each author says and remember that different authors sometimes have different ideas or focus on different facts.

How many similarities and differences do I need to find?

In 2nd grade, try to find at least one thing that is the same and one thing that is different. The more you can find, the better you understand both texts.

What words can I use when I write my comparison?

Use words like 'both,' 'also,' and 'similarly' for things that are the same. Use words like 'but,' 'however,' and 'only' for things that are different.

Does the topic have to be a science or social studies subject?

No, the topic can be anything — animals, weather, community helpers, holidays, or even a person like a historical figure. Any two texts that share a subject can be compared.

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