Task: estimate how often seniors miss first period. Source: attendance-system timestamps for every senior this semester. What is its strongest fit for the task?

A student is writing for the school board about whether cafeteria lines delay lunch. Source: checkout time stamps from every register for six weeks. What is the source's strength?

Research question: Has the school garden increased produce used in lunches? Source: weekly harvest logs listing pounds of tomatoes, lettuce, and herbs delivered to the kitchen. What is its useful strength?

For a report on how freshmen use the library after school, a librarian offers sign-in records with grade level and entry time for each visit. Which strength is most relevant?

Task: compare promised and delivered features of a new district app. Source: the vendor's proposal and the final app checklist. What is the source pair's strength?

A podcast script argues that a local bus route serves students unevenly. Source: a map of stops with student addresses plotted by block. What is its strongest use?

For an editorial on whether club fees discourage participation, a treasurer provides three years of club rosters and fee amounts. Which strength best fits the task?

Same attendance timestamps, new task: explain why seniors miss first period. What limitation matters most?

Source: a voluntary survey sent through the drama club's social media account. Task: describe what all students want in next year's arts offerings. What is the central limitation?

Task: advise parents about homework load. Source: a teacher's log of assignments given, with estimated completion times. Which limitation should the writer note?

A student uses an alumni newsletter to study graduates' career paths. It profiles only alumni who donated this year. What bias limits the source?

Task: determine whether a tutoring program improves grades. Source: end-of-year testimonials from students who completed the program. What limitation is most important?

For a report on whether the school should add shaded outdoor seating, the source is noon temperature readings from one sunny week in May. What is the limitation?

A brochure from a test-prep company reports that its users' scores rose after taking its course. Task: evaluate whether the course causes gains. What limitation bears on the task?

Task: show how a proposed phone policy would affect classroom discussion. Source: discipline referrals for phone use last year. What limitation is most relevant?

A report on cafeteria reform relies entirely on anonymous student complaint cards. What consequence follows?

A senior project about teen sleep cites only a wearable-device company's user dashboard from students who own its tracker. What is the overreliance problem?

A presentation on community views of a stadium plan uses only comments from a public hearing held at 2 p.m. on a weekday. What disappears from the argument?

An essay on whether uniforms reduce bullying relies only on the principal's annual discipline summary. What will the essay likely miss?

A policy memo about adding AP courses uses only sign-up requests from current juniors. What overreliance consequence is most likely?

You have cafeteria checkout timestamps and need to explain lunch-line delays. Which second source best balances the evidence?

To test whether club fees discourage participation, rosters and fee amounts show changes over time. What added source would most improve the synthesis?

A draft about shaded outdoor seating has one week of noon temperature readings. Which source-balance move addresses the limitation?

A report on whether tutoring improves grades has testimonials from completers. Which added source best tests the causal claim?

A podcast on bus-route equity has a stop map with student addresses by block. Which source would best complement it for a public audience?