Reading & WritingChapter 1: Central Ideas and Details
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Prompt
What is a main idea?
Answer
The most important complete message a text communicates about its subject.
Prompt
What is a supporting detail?
Answer
A narrower fact, example, reason, description, or event that develops the main idea.
Prompt
Topic vs main idea
Answer
A topic names the subject; a main idea states what the text communicates about it.
Prompt
The coverage test
Answer
Ask whether the choice accounts for every major part of the passage.
Prompt
The precision test
Answer
Reject a choice so broad that it could fit many unrelated passages.
Prompt
True but too narrow
Answer
A choice may accurately repeat one detail yet fail to represent the passage as a whole.
Prompt
True but too broad
Answer
A choice may express a general theme while dropping the passage's specific relationship.
Prompt
Why paraphrase first?
Answer
It gives you a text-based target before attractive answer wording can distract you.
Prompt
Repeated idea signal
Answer
Repeated or developed ideas often point toward the passage's center, but wording need not repeat exactly.
Prompt
Contrast signal
Answer
A word such as but or however may reveal the relationship the main idea must preserve.
Prompt
Can a supporting detail be important?
Answer
Yes. Importance alone does not make it broad enough to be the main idea.
Prompt
Main-idea answer shape
Answer
Subject plus the text's main development, finding, change, or claim.
Prompt
Vivid-detail trap
Answer
Memorable names, numbers, or images can draw attention away from whole-passage scope.
Prompt
Outside-knowledge rule
Answer
Judge each choice only by the passage, even if another claim seems generally true.
Prompt
One-sentence check
Answer
Complete ‘The text mainly shows that …’ without listing every example.
Prompt
Detail-function question
Answer
Ask how the detail explains, illustrates, qualifies, or contrasts with the main point.
Prompt
Scope mismatch
Answer
The choice covers less or more than the passage actually develops.
Prompt
What if two choices are true?
Answer
Choose the one with the best combination of whole-passage coverage and exact scope.
Prompt
Main idea is not a title
Answer
A title can name a subject; the answer must express a complete idea about it.
Prompt
Final verification
Answer
Point from each major sentence to a part of the selected main idea.
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