Investigation / Comparative reasoning
The Evidence Lab
Everyday mysteries.
Better questions.
A good story is only the beginning. Investigate a suspicious café claim, an accused navigation app, and a final battery-saver headline. Compare rival explanations, request evidence that separates them, and defend what the records support. Core teaches fair comparisons and event order; Full also asks students to design their own mystery and investigate public power. First checked responses, later revisions, and opened hints remain visible in a printable reasoning record. Created by Yoav Duman.
Created by Yoav Duman · edition 2026-10-10.1
Core · two cases and a last challenge
Practice a fair comparison, investigate a misleading group average, and ask which event came first. Finish with a headline that supplies no answer choices.
9 steps · estimated 30–40 minutes of play. For a 50-minute class, protect time for discussion and export.
Start CoreFull · build an investigation
Keep the Core cases, propose your own study, critique its design, and consider how evidence connects to public authority.
12 steps · estimated 45–60 minutes of play, plus discussion. Suitable across sessions or as a take-home assignment.
Start FullMake the evidence answer your question.
The full activity opens below. Choose your instructor’s route on Start. If this browser already has a draft, its route and responses are preserved.
Progress saves in this browser when available. Use the save status and download a backup before moving devices or websites. Open the activity on its own.
For instructors
Different cases. Different reasoning moves.
The plants distinguish growth from starting height. The café exposes a misleading mix of visits. The app distinguishes event order from motive. Full asks learners to produce differing predictions and critique their own comparison.
Assess the explanation students can reconstruct afterward. The game records choices, word minimums, first checks, revisions, and hints; it does not automatically judge written reasoning or demonstrate long-term learning.
Assign and submit
Give students a Core or Full link and a clear submission instruction. PDF or text is the readable assignment; JSON is a restorable checkpoint. No work is submitted automatically.