The Case for Sleeping In
An original science article on teenage sleep and school start times — with evidence planted at three strengths. Students find the central idea (it isn't 'sleep is good'), trace how the text develops it paragraph by paragraph, rank the evidence, and write the objective summary that RI.8.2 demands.
Common Core standards covered
- RI.8.1Cite the textual evidence that most strongly supports an analysis of what the text says explicitly as well as inferences drawn from the text.
- RI.8.2Determine a central idea of a text and analyze its development over the course of the text, including its relationship to supporting ideas; provide an objective summary of the text.
© Copyright 2010. National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved.
Teacher-facing overview
Big idea: Determine a central idea of an informational text, analyze its development including supporting evidence, cite the strongest evidence, and write an objective summary.
Student target: “I can state a text's central idea as a claim, map how each paragraph develops it, rank the supporting evidence by strength, and write an objective summary free of my own opinions.”
Success criteria: I can distinguish the central idea (a claim) from the topic (a subject). · I can name the job each paragraph does for the idea's development. · I can rank evidence — anecdote, mechanism, study — and defend the ranking. · I can write a summary a person on either side of the issue would sign.
Essential question
A central idea is not a topic, and evidence is not a pile — it has grades. How does a nonfiction text BUILD its idea, and which of its bricks carries the most weight?
Learning target: I can state a text's central idea as a claim, map how each paragraph develops it, rank the supporting evidence by strength, and write an objective summary free of my own opinions.
Success criteria
- I can distinguish the central idea (a claim) from the topic (a subject).
- I can name the job each paragraph does for the idea's development.
- I can rank evidence — anecdote, mechanism, study — and defend the ranking.
- I can write a summary a person on either side of the issue would sign.
Why this matters
RI.8.1 and RI.8.2 are the informational twins of the literature evidence standards — but nonfiction raises the stakes: evidence comes in KINDS (anecdote, mechanism, correlation, experiment), and Grade 8's 'most strongly' requires knowing the kinds have ranks. This article is built for that lesson: the same claim supported at three engineered strengths, a concession paragraph that develops the idea by absorbing objections, and a topic — their own tiredness — where every student arrives with an opinion the objective summary forces them to park.
Students should already be able to
- Topic vs. main idea, informally.
- Reading a data sentence (percentages, comparisons).
- Citing by paragraph number.
Where this shows up outside the classroom
Assessment plan
Formative — for feedback during the lesson
- Warm-up categories — where does the class's prior blame sit?
- Development map — job labels, not content summaries, before the ranking.
- Ranking circulation — skeptic-test lines written before verdicts shared.
Summative — the graded evidence: Exit ticket (claim + champion + summary sentence) plus the ranking board; the missing-evidence and opposing-claim challenges rank as extension evidence.
The passage: “The Case for Sleeping In”
An original informational article written for this lesson (≈700 words). Reproduce freely for your classroom.
¶1 At 6:15 on a school morning, Maya Torres's alarm goes off for the third time. Her mother calls this laziness. Her first-period teacher calls it a bad attitude. A sleep scientist would call it something else entirely: biology, running exactly on schedule.
¶2 Here is the schedule in question. At puberty, the human body shifts its circadian rhythm — the internal clock that decides when we feel sleepy and when we feel alert — roughly two hours later. The hormone melatonin, which signals the brain that it is time to sleep, starts releasing in teenagers around 10:45 p.m., compared with about 9:00 p.m. in younger children and many adults. A teenager told to sleep at 9:30 is being asked to do something their brain chemistry has not yet made possible. This is not a habit. It is a phase of human development, as predictable as a growth spurt.
🔒 The full text — 8 numbered paragraphs, plus the photocopy-ready handout — ships in the kit. See plans →
The task students work on
The class tests this central-idea candidate: 'Teenage sleep deprivation is a schedule-design problem, not a willpower problem.' Teams verify it against every paragraph, complete the evidence-ranking board (anecdote vs. mechanism vs. study), defend their champion with the skeptic test, and finish with the two-sentence objective summary — the one a superintendent AND a sleep scientist would both sign.
Evidence-ranking board — three kinds, one champion. Cite by ¶.
| Evidence (with ¶) | What kind is it? | Strength (1–3) | Why this rank |
|---|---|---|---|
| Maya Torres and the third alarm (¶1, ¶8) | |||
| Melatonin shifts ~2 hours later at puberty (¶2) | |||
| Seattle: monitors, +34 min, better grades (¶5) |
Anticipated student strategies
Claim testing first because everything else depends on having the right central idea. Kind sorting second — it converts 'strong' from a feeling into a category. Skeptic testing last, as the tiebreaker that makes rankings defensible.
- Claim testing. The student takes the candidate central idea and walks it through every paragraph asking: does this ¶ serve the claim, and how?
The intended method — it produces the development map as a side effect. Share first.
🔒 2 more anticipated strategies with select-and-sequence guidance are in the full lesson. See plans →
Lesson script
Board the answers in implicit categories (choices / habits / schedules). Name the skill: informational texts don't just have topics, they have CLAIMS — and today's has one that will argue with some of these answers.
Listen for: No — it's a topic. A central idea takes a position a paragraph could support or a skeptic could dispute.
The full article is in the workbook and the handout. Board the development map as it emerges: ¶1 hooks with one girl, ¶2 explains the biology, ¶3 collides biology with schedules, ¶4 prices the damage, ¶5 proves with the experiment, ¶6 concedes the logistics, ¶7 reframes the whole debate, ¶8 returns to the girl. Then test the candidate central idea against the map — every paragraph should be doing work FOR it.
- A central idea is a claim, stated as a sentence.
- Development = the sequence of jobs the paragraphs do for the claim.
Listen for: Too weak — nobody disputes it, and ¶6–¶7 would be pointless. The actual claim is about WHOSE problem this is: schedules, not willpower.
🔒 The remaining 4 steps — fully scripted with teacher-says lines, discourse questions, look-fors, and interventions — are in the full lesson. See plans →
Misconceptions and how to respond
- “The central idea is 'teens need more sleep.'” That's a fact the article uses, not the claim it argues. If that were the idea, ¶6 and ¶7 would be filler. The claim is about the CAUSE — schedules versus willpower — which is why the asymmetry paragraph is the peak.
- “The best evidence is the most memorable one.” — the teacher response is in the full lesson.
- “A good summary includes the article's best line.” — the teacher response is in the full lesson.
- “The concession paragraph weakens the article.” — the teacher response is in the full lesson.
🔒 Every misconception ships with a tested classroom response. See plans →
Scaffolded practice
The workbook follows gradual release rather than a page of blank prompts: 2 fully worked, 2 partially completed, then 4 independent.
- I doLiteral first — the development map. Name the job each of the eight paragraphs does for the central idea, one phrase each.
🔒 7 more prompts across all three release tiers are in the full lesson. See plans →
Worked solutions and scaffolds for every prompt are in the downloadable kit, included with membership. See plans and pricing.
Exit ticket
- State the article's central idea as a one-sentence claim.
🔒 2 more exit-ticket questions are in the full lesson. See plans →
Worked answers, the completed answer tables, and the scoring rubric are in the downloadable kit, included with membership. See plans and pricing.
Printable handouts in the kit
All handouts are in Printable_Handouts.pdf inside the kit download.
Materials and classroom resources
Student experience
Students enter through a low-floor prompt, build or sketch a model, test a strategy, revise their thinking, collaborate, and present a final solution. The task remains accessible while allowing for sophisticated reasoning.
Detailed facilitation notes
- Step 1: First read: the article straight through, no marking. Ask: “What do you notice?”, “What could you try next?”, and “How can you prove that?”
- Step 2: Second read: mark where the central idea gains a new kind of support. Ask: “What do you notice?”, “What could you try next?”, and “How can you prove that?”
- Step 3: Rank three pieces of evidence: which MOST strongly supports the claim? Ask: “What do you notice?”, “What could you try next?”, and “How can you prove that?”
- Step 4: Write the two-sentence objective summary — opinions left at the door. Ask: “What do you notice?”, “What could you try next?”, and “How can you prove that?”
Differentiation and inclusion
Support: The evidence-strength frame (anecdote / mechanism / study) gives rankings a vocabulary; extend with the asymmetry paragraph (¶7) and the counterargument audit.
Language support: “I started by…”, “My model shows…”, and “I know my answer is reasonable because…”.
Extension: Require a second solution, alter a condition, or have students write a challenge for another group.
Accessibility: Manipulatives, enlarged visuals, oral response choices, partner reading, and reduced-copy student pages.
Assessment plan
Formative checks: Strategy choice, accuracy, representation, collaboration, and explanation.
End evidence: One central-idea statement, one champion evidence with ¶ citation and defense, one objective summary.
Mastery: The student completes the task accurately and explains the strategy with limited prompting.