Source Evaluation for a Later Start-Time Essay
A candidate is writing a source-based essay on later school start times and attendance. Found: (A) a 2021 peer-reviewed study in a journal, n=9 high schools, found a 1.5 percentage point attendance increase after an 8:30 start, and the authors note limited generalizability; (B) a 2023 district press release announcing attendance improved dramatically after a schedule change, with no data; (C) a 2020 parent blog arguing teens need sleep, which links to a pediatric association recommendation but gives no attendance data. The essay prompt asks the writer to use at least two sources to evaluate whether later start times are likely to improve attendance at a specific urban district. The candidate has room for four sources maximum and must include one limitation. The candidate plans a 700-word essay and has time to read two sources closely and skim one. The essay must distinguish correlation from causation in at least one place.
1. Rank and select the sources, explaining the tradeoffs.
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Source A should be the core: it is peer-reviewed, directly measures attendance after a start-time change, and reports its limitation. Source C is useful for background on adolescent sleep and the pediatric recommendation, but it has no attendance outcome, so it cannot support the causal claim. Source B is the weakest: a district press release with no data or methods is promotional, not evidence. The best two-source combination is A plus C, with B used only as a labeled local claim if space allows-'the district announced improvement, but no data were provided'-not as proof. That combination answers the prompt while respecting relevance and credibility. The essay should explicitly note that A's nine-school sample limits generalization to the specific urban district, which satisfies the limitation requirement.
2. Propose one search refinement to find evidence for the specific urban district.
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A useful refinement is to search for district-level longitudinal evidence combining the concepts 'urban high school,' 'later start time,' and 'attendance,' then add 'district data' or 'before-after.' Searching only 'school start times' will return sleep and health sources, not attendance outcomes. The writer should use ERIC and Google Scholar for peer-reviewed studies and also look for large districts that publish enrollment and attendance reports with methods. Inclusion criteria should be: an attendance measure, a comparison or before-after design, and a stated sample. If no urban-specific study appears, the writer can say the evidence is indirect and call for local pilot data. That is stronger than pretending a press release or parent blog fills the gap.
3. Write a paraphrased sentence using source A's finding and its limitation, without plagiarizing.
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Paraphrase: 'A 2021 peer-reviewed study of nine high schools found that attendance rose by about 1.5 percentage points after start times moved to 8:30, though the authors cautioned that the small sample limits generalizability (Author, 2021).' This is not plagiarism because it restates the finding in the writer's own sentence structure, includes the key numbers, and credits the source. It also preserves the limitation instead of overselling the result. If the writer needs a direct quotation, the quoted words must be exact and placed in quotation marks with a citation; the paraphrase above should not borrow a distinctive phrase without quoting it. For the urban-district prompt, the next sentence should explain why the finding is relevant but not automatically transferable.