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Cold-Case Timeline Lab

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Grades 6-860-75 minSource: Creative Dad Company

Teams reconcile conflicting witness accounts, records, and physical measurements to build the most accurate timeline of a fictional cold case, respecting what the evidence can and can't prove.

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Prep: 15 minActivity: 40 min1 session~$2/groupOne table or a clear section of floorBeginner-friendly

Setup

Print or hand-copy the essential prompt for Cold-Case Timeline Lab, then set out only paper, pencils, and the common or recycled items needed for one test. Use a tabletop representation whenever the original version mentions a room, specialized device, or digital tool; the learning comes from the decisions and evidence, not elaborate scenery.

Activity

  1. Read the witness statements and physical evidence cards and predict what order of events they suggest.
  2. Build a timeline on poster paper, placing each piece of evidence at its estimated time.
  3. Find two pieces of evidence that contradict each other, weigh their reliability, and adjust the timeline to reflect the uncertainty honestly.
  4. Present the reconstructed timeline, clearly marking which parts are certain and which remain unresolved.

Done when: The group has completed Cold-Case Timeline Lab when it can present the reconstructed timeline, clearly marking which parts are certain and which remain unresolved and point to the observation, measurement, comparison, or trial that supports its conclusion.

Materials

printed witness statement cards, timeline poster paper, string, sticky notes, markers

Shown for the Quick Start version — switch tabs above to see what changes.

Disclosure: Materials links below go to Amazon. As an Amazon Associate, Creative Dad Company earns from qualifying purchases at no extra cost to you.

Steps

  1. Read the witness statements and physical evidence cards and predict what order of events they suggest.
  2. Build a timeline on poster paper, placing each piece of evidence at its estimated time.
  3. Find two pieces of evidence that contradict each other, weigh their reliability, and adjust the timeline to reflect the uncertainty honestly.
  4. Present the reconstructed timeline, clearly marking which parts are certain and which remain unresolved.