AP English Language / Claims and Evidence
Lesson
Evidence needs commentary
A quotation is raw material. Commentary says what it is doing in your argument.
Learning goals
- Pair a piece of evidence with commentary that explains its work.
- Choose evidence that actually matches the claim’s scale.
Explanation
Facts, examples, data, and quotations can all be evidence. None of them whisper your conclusion. Commentary is the sentence that says, “This matters because…” If you delete the quotation and your paragraph still makes the same move, the quotation was decoration.
Mismatched evidence is common. A single interview cannot prove a national trend. A national statistic cannot, by itself, prove what happened in one hallway. Name the gap. A fair writer either narrows the claim or finds a second kind of support.
Key terms
- Evidence. Material offered to support a claim, such as data, example, or quotation.
- Commentary. The writer’s explanation of how a piece of evidence supports the claim.
Common mistakes
- Dropping a quote and moving on (the “quote sandwich” with no filling).
- Using a vivid story as if it automatically represents everyone.
Practice
Original Marlow Works items. Check the answer explanation after you try.
A student claims that later school start times improve teen alertness. Describe one type of evidence that would strengthen the claim and one type that would be too weak by itself.
Original Marlow Works item — not a College Board question.
Take your time—this is practice, not a test.
Answer explanation
A student cites one neighbor’s flooded basement to prove “the city never maintains drains.” What should change?
Answer. Either gather broader evidence or shrink the claim to what one case can support.
A single story can illustrate; it cannot, alone, prove a citywide never.
Related resources
External links with reuse status. Marlow Works is independent and does not copy restricted exam or textbook material.
Official / link only
AP English Language and Composition course page
Official skills framework for rhetoric, argument, and synthesis.
College Board · All rights reserved · accessed 2026-10-01
Open sourceCC BY — attribution required
English Composition: Connect, Collaborate, Communicate
Open composition text for writing process, argument, and revision.
Open Textbook Library listing · CC BY · accessed 2026-10-01
Open source