Source Reliability in a Sleep-Start Debate
Ms. Arsenault's Grade 6 class is preparing a two-minute presentation for the school advisory council on whether classes should start at 8:00 or 8:45. Each group must use two sources. Group 3 has summarized two web pages in their notes. Source A is a bright blog post titled 'Wake Up, Schools!' on TeenHealthNow, a site with advertisements for energy drinks. It has no author name or date. It says 'everyone knows 90% of teens are sleep-deprived' and includes a colourful bar chart with no title, labels, or numbers. Source B is a 2024 report from the district health office. It surveyed 420 students in Grades 6–8 and reports that 62% get less than eight hours of sleep on school nights. It names the survey method, admits that students self-reported, and recommends an 8:45 start after reviewing three schools. Mateo wants to use Source A because 'the chart looks more scientific and the title is exciting.' The group must decide before tomorrow.
1. Which source should Group 3 rely on for their main evidence, and what specific details support your choice? Explain why the other source is weaker.
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Source B is the stronger evidence source. It names the district health office, gives a 2024 date, reports a sample of 420 Grade 6–8 students, describes the survey method, admits self-reporting, and states a recommendation based on three schools. Those details let the audience judge how the number was produced. Source A has no author or date, is published on a site selling energy drinks, and uses the vague phrase 'everyone knows' for a specific 90% claim. Its chart has no title, labels, numbers, or scale, so readers cannot check what is being compared. Source A might be used as an example of a dramatic public message, but not as proof. The group should use Source B for the main claim and, if they mention Source A, explain why it is unreliable.
2. Mateo says the chart in Source A 'looks more scientific.' Explain two ways the chart could mislead a viewer and what information would make it trustworthy.
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The chart could mislead in at least two ways. First, with no title or labels, viewers do not know what the bars measure-sleep loss, energy-drink sales, or something else. Second, with no numbers or scale, a tall bar can make a small difference look large; the designer may also have chosen a truncated axis or grouped categories unevenly. The 90% figure is not linked to a sample or survey, so it may be invented or repeated from elsewhere. To be trustworthy, the chart would need a clear title, labelled axes, a stated sample size and date, exact percentages, and a source the reader can check. It should also show whether the comparison is between groups or over time.
3. Write a sentence the group could say in the presentation that uses Source B accurately without overstating it.
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In a 2024 district health-office survey of 420 Grade 6–8 students, 62% reported getting less than eight hours of sleep on school nights. Because students reported their own sleep, the result is an estimate rather than a direct measurement. This sentence is accurate because it gives the source, date, sample, and exact wording ('reported'), and it does not claim that a later start would improve grades or sleep. It also avoids saying 'most teens' or 'all students,' which would go beyond the data.