GED Reasoning Through Language Arts
Main Idea & Summary
The main idea is the one sentence the whole passage exists to say. Every paragraph is either stating it, proving it, or giving an example of it. Test answers that are too narrow (one detail) or too broad (the whole subject) are wrong on purpose.
The words first
- main idea
- the single point the whole passage argues or explains
- detail
- a fact or example used to support the main idea — never the answer to a main-idea question
- summary
- the main idea plus only the biggest supporting points, in your own words
- topic
- what the passage is about in a word or two — NOT the same as the main idea
The method
TOPIC vs MAIN IDEA
topic: exercise (a subject)
main idea: regular exercise improves (a claim ABOUT the subject)
memory in older adults
HOW TO FIND IT
1. Read the first and last paragraph closely — it usually lives there.
2. Ask: what do ALL the paragraphs keep coming back to?
3. Test each answer choice: does the WHOLE passage support it,
or only one paragraph?
ELIMINATION PATTERN
too narrow → true, but only covers one detail
too broad → about the subject, but bigger than this passage
just right → every paragraph helps prove it
Worked all the way through
The problem
A passage spends four paragraphs on how city trees lower summer temperatures, cut air pollution, and raise property values. Which is the main idea: (A) Trees lower temperatures, (B) Urban trees provide several important benefits, (C) Nature is valuable?
- Step 1 — Name the topic.City trees. That is the subject, not yet the idea.
- Step 2 — Ask what every paragraph has in common.Each paragraph names a different BENEFIT of city trees.
- Step 3 — Test choice A.Temperatures is one paragraph only. Too narrow.
- Step 4 — Test choice C.Nature in general is bigger than this passage. Too broad.
- Step 5 — Test choice B.Several benefits covers all four paragraphs. That is the one.
On the board
topic: city trees
the subject
¶1 cooling, ¶2 pollution, ¶3 property values
what each paragraph adds
common thread: benefits
what they all share
A = one paragraph → too narrow
C = bigger than the passage → too broad
B covers everything → main idea
Answer
B — urban trees provide several important benefits
A second one, in a different form
The first sentence says "Remote work is reshaping American cities." The rest gives three examples of the reshaping. Where is the main idea?
first sentence makes a claim
reshaping cities
every later paragraph = one example of it
claim + everything supports it
that IS the main idea
main idea: sentence one
Answer
The first sentence — the rest of the passage exists to prove it
The usual mistake
Choosing a vivid detail you remember instead of the overall point.
Check yourself
Say the passage's point out loud in your own words BEFORE reading the choices. If you pick the choice that matches your own sentence, the too-narrow and too-broad traps stop working.
Practice it
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