How do you find the central idea of an informational text and tell it apart from a supporting detail or the topic?
Central ideas in informational texts: determining the central idea of an informational passage, distinguishing it from the topic and from supporting details, and tracing how details and text structure develop the central idea across a STAAR informational text.
How to determine the central idea of a STAAR English I informational passage: telling the central idea apart from the topic and from supporting details, and tracing how details and text structure develop it. STAAR tests central idea with multiple choice, multiselect, hot text, and short constructed responses.
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What this skill is asking
The central idea is the main point an informational text develops, and determining it is one of the most common STAAR English I informational tasks. Questions ask which sentence "best states the central idea" (multiple choice), ask you to select all details that support it (multiselect), ask you to click the sentence that states it (hot text), or ask you to state it and support it with evidence (short constructed response). The skill students lose marks on is the difference between the central idea (the whole point) and a supporting detail (one piece of it) or the topic (the subject in a phrase). This page covers how to determine the central idea, how to tell it apart from topic and detail, and how text structure helps you find it. The transferable skill is reading for the one point the whole passage adds up to.
Central idea, topic, and supporting detail
The central-idea error is confusing three levels of generality.
The test for the central idea is coverage: does your statement account for every major section of the passage? If a candidate covers only one paragraph, it is a supporting detail; if it is just a subject with no point, it is the topic. The right answer sits in between, a full statement the whole text develops.
Using text structure to find the central idea
How a passage is organized points to its central idea.
A long informational passage can have section-level main ideas that all feed one overall central idea. STAAR sometimes asks for the central idea of a single paragraph and elsewhere for the whole text; read the question carefully to know which scope it wants, then match your answer to that scope.
Determining the central idea under time pressure
Try this
Q1. What is the difference between the central idea and a supporting detail? [Recall]
- Cue. The central idea is the main point the whole passage develops; a supporting detail is one specific fact or example that helps prove it. The central idea covers the whole; a detail covers a part.
Q2. An article describes a problem (plastic waste in oceans) and then several ways to reduce it. Where is its central idea most likely to be, and why? [Short explanation]
- Cue. In the solution it argues for, because problem-solution texts usually build toward the response they recommend. The central idea is the claim that these measures can reduce ocean plastic, which the whole text develops.
Exam-style practice questions
Practice questions written in the style of TEA exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
STAAR English I (informational, style)1 marksAn article explains how city parks lower temperatures, clean the air, and improve residents' mental health. Which best states the central idea? (1) Parks have trees. (2) Urban parks provide multiple environmental and health benefits to cities. (3) One city built a new park last year. (4) Trees release oxygen.Show worked answer →
Answer: (2). The central idea is the main point the whole text develops, broad enough to cover its sections. The article's three areas (temperature, air, mental health) are all benefits of urban parks, so (2) captures the idea the details support.
Why not the others: (1) and (4) are supporting details, narrower than the whole; (3) is a single example. The central idea must account for the article as a whole, not one paragraph, which only (2) does.
STAAR English I (info, SCR style)2 marksShort constructed response. State the central idea of the passage and support it with one piece of relevant evidence from the text. (Scored on the 2-point SCR rubric.)Show worked answer →
A 2-point response states the central idea as a sentence and proves it, for example: "The central idea is that urban parks benefit cities in several ways. The text supports this when it reports that parks 'lower nearby temperatures by several degrees,' one of the environmental benefits it develops."
Markers award 2 points for a correct central idea supported by relevant evidence, 1 point for a central idea with no evidence or evidence with no clear idea, and 0 for neither. A detail offered as the central idea (for example, "parks have trees") caps the score, because a detail is narrower than the whole.
Related dot points
- Analyzing argument and claims: identifying the central claim of an argumentative text, separating reasons and evidence from the claim, recognizing rhetorical appeals (logos, ethos, pathos), and evaluating whether the support is relevant and sufficient in a STAAR argumentative passage.
How to analyze argument on a STAAR English I argumentative passage: identifying the central claim, separating reasons and evidence, recognizing rhetorical appeals (logos, ethos, pathos), and evaluating whether support is relevant and sufficient. STAAR tests this with multiple choice, multiselect, and short constructed responses.
- Author's purpose and craft: determining an author's purpose (to inform, persuade, or entertain) and point of view, and analyzing the craft choices, text structure, word choice, tone, and text features, that an author uses to achieve that purpose in a STAAR informational text.
How to analyze author's purpose and craft on STAAR English I: determining purpose (inform, persuade, entertain) and point of view, and analyzing the craft choices (structure, word choice, tone, text features) used to achieve it. STAAR tests this with multiple choice, hot text, and short constructed responses.
- Reading cross-curricular passages: approaching informational passages with topics drawn from science, social studies, or the arts, understanding that the questions assess reading skill rather than subject knowledge, and handling unfamiliar terminology, data, and graphics in a STAAR passage.
How to read cross-curricular informational passages on STAAR English I: science, history, or arts topics where questions assess reading skill, not subject knowledge. Handling unfamiliar terms, data, and graphics. STAAR tests this with multiple choice, hot text, and graphic-based items.
- Text evidence and inference: drawing inferences that an informational text supports, anchoring each inference to its textual trigger, selecting the evidence that best supports a given conclusion, and rejecting the over-reaching and unsupported inferences that STAAR distractors are built from.
How to make inferences and select evidence on STAAR English I informational passages: drawing conclusions the text supports, anchoring each to its trigger, choosing the evidence that proves a conclusion, and rejecting over-reach. STAAR tests this with multiple choice, multiselect, hot text, and multipart items.
- Analyzing theme in literary texts: stating a theme as a complete sentence about life or human nature (not a topic word), distinguishing theme from subject and from moral, and tracing how a writer develops a theme through plot, character, and detail across a STAAR literary passage.
How to analyze theme on a STAAR English I literary passage: stating theme as a full sentence about life rather than a one-word topic, telling theme apart from subject and moral, and tracing how plot, character, and detail develop the theme. Theme questions appear in multiple choice, hot text, and short constructed response form.