Learn Investigate survey headlines and trace repeated claims back to their observations.
Start with everyday situations, predict an outcome, and test your ideas. You need basic arithmetic, percentages and graph reading; explanations introduce additional ideas where needed. No coding or account is required. Every investigation has school, college and workplace extensions—you can choose any of them.
Inspect original evidence, reconcile apparent conflicts, explain survey and headline distortions and justify a policy comparison.
Open any topic directly. Review functions and graphs whenever useful.
The original two-investigation starter remains available. Choosing the full course adds its published lessons to your selected scope; your earlier work stays saved. Skipping does not count as completion or understanding.
Free exploration: no completion scope selected yet. Project reports and independent evidence are tracked separately.
Choose a unit, then open a lesson on its own page. This outline lists the sequence; it does not combine the full lessons into one page.
Match claims to original scope and distinguish repeated reports from new observations.
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Does the cited document establish the claim’s scope and time?
Inspect complete short original maintenance excerpts and a broader summary. The fixture does not access live news.
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How much new evidence does a repost add?
An original fictional report counts working water fountains. Reposts repeat it; separately authored inspections observe fountains on later days. No live sources or truth scores are used. The count choice applies only when at least one additional inspection exists.
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Are two reports measuring the same thing?
Compare records that differ in location, date or definition of a working fountain.
Inspect response composition and translate relative risk into absolute counts.
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Can a headline move while every group holds the same views?
Fictional 100-person community: 75% of group A and 25% of group B support a proposal. You control group sizes and response rates, not opinions.
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What does a relative reduction mean in actual counts?
Original fictional study rates use the same 1,000-exposure denominator. Compare relative and absolute framing.
Compare feasible policies by total benefit, distribution and missing access evidence.
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Can equal total benefits reach different groups?
Three fictional repair plans serve north and south regions with whole-plan budget requirements.
Prepare a brief about fictional fountain repairs. Trace claims to original records, resolve incompatible comparisons, write an honest headline and compare policy benefits under a budget. Include a source table and an explicit fairness criterion.
Save a report, compare captured evidence, and attempt three new cases. A completed report records submitted work; the rubric supports a separate human review of its quality.
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