Central idea — English definition

Defined in 7 courses:

The most important idea a text develops; in a story this is closely tied to its theme, and in a poem it is the main feeling or insight the poem builds toward. (English 6)
The most important point a nonfiction text is getting across — the big idea that all the details add up to. (English 6)
A main understanding an informational text develops through its details. (English 7: Reading, Evidence & Expression)
The main point a nonfiction text makes about its topic. (English 8: Trust, Community & Responsibility)
The main point a text builds around; in fiction this is often called theme. (English 9: Experience, Perspective & Inquiry)
The main point a text is built to convey; in fiction this is usually called the theme. (English 10: Choices, Conscience & Consequences)
A dominant concern a text develops across its length; a work usually braids two or more together. (English 12: Complex Texts, Independent Inquiry & Public Voice)

Where it is taught

Theme & Summary — Reading Literature, English 6, Grade 6
Central Idea & Supporting Details — Reading Informational Text, English 6, Grade 6
Central Idea & Supporting Details — Information, Media & Evidence, English 7: Reading, Evidence & Expression, Grade 7
Central Idea & Objective Summary — Informational Reading & Media, English 8: Trust, Community & Responsibility, Grade 8
Theme & Central Idea — Close Reading & Literary Analysis, English 9: Experience, Perspective & Inquiry, Grade 9
Theme & Central Ideas — Close Reading & Literary Analysis, English 10: Choices, Conscience & Consequences, Grade 10
Theme, Symbol & Motif — Close Reading & Literary Analysis, English 12: Complex Texts, Independent Inquiry & Public Voice, Grade 12

In use

In informational writing, a central idea is a main point the text explains or argues.
Theme & Summary

That point is the central idea: the single most important thing the author wants you to understand once you finish reading, and everything else on the page is there to build it up.
Central Idea & Supporting Details

A central idea is a main understanding developed by an informational text, not just its topic or a copied title.
Central Idea & Supporting Details

Questions using central idea

Problem 1

The central idea of an informational text is best described as…

The main point the whole text builds and supports
The author's personal opinion of the reader
The first word of the title
One small fact that appears a single time

Answer and explanation

The main point the whole text builds and supports

The central idea is the overall main point the whole piece builds and supports, not a single detail or the title.

Problem 2

Which of these is a central idea rather than just a topic?

A book about volcanoes
Volcanoes can create new land as well as destroy it
The word 'eruption'
Volcanoes

Answer and explanation

Volcanoes can create new land as well as destroy it

A topic is just a word or phrase ('volcanoes'); a central idea makes an actual point about that topic.

Problem 3

Which of these is a supporting detail rather than a central idea?

People should protect bees.
Honeybees are important to farms in many ways.
One study found a single bee colony can pollinate millions of flowers in a day.
Bees matter.

Answer and explanation

One study found a single bee colony can pollinate millions of flowers in a day.

The specific study and number is a detail used as evidence for the broader central idea about why bees matter.

Problem 4

Read: "Deserts may look empty, but they are full of life. Many desert animals sleep in cool burrows during the day and hunt at night. Cactus plants store water in their thick stems to survive months without rain. Some desert lizards can even go their whole lives without drinking, getting all the water they need from their food." State the central idea in one full sentence.

Answer and explanation

Deserts are not really empty — they are full of living things that have special ways to survive with very little water.

Taught alongside

Elsewhere

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