A wagon found. Bones uncovered. A family lost to time. Send students into a real-world historical investigation where they learn about conditions on the Oregon Trail while reconstructing what happened to a vanished pioneer family.
 
In this CSI-style historical investigation, students act as forensic historians examining the mysterious disappearance of the Halbrook family along the Oregon Trail in 1835. Using diary excerpts, archaeological findings, environmental data, and osteological reports, students build a timeline, analyze physical evidence, and develop a supported hypothesis.
 
This lesson reveals the real dangers of westward migration—drought, contaminated water, broken wagons, illness, and environmental exposure.


Download a Sample
 
What’s Included
Introduction scenario: Discovery near Guernsey, Wyoming
Margaret Halbrook diary excerpts
Soil analysis report
Forensic (human remains) analysis report
Campfire excavation report
Historical newspaper clipping
Student investigation worksheet
Answer key
Teacher guide 
 
What Students Will Learn
Analyze written, archaeological, and forensic evidence
Construct a chronological timeline from primary-style sources
Interpret environmental and scientific data in historical context
Develop and defend a supported historical hypothesis
Explain how geography and climate shaped westward migration
 
Grades: 7–10
Duration: 1–2 Class Periods
DOK Level: 3
Format: Printable Investigation Activity