Grade 8 · Social studies · 35 minutes
Unit 3 · Policy and Corroboration · Lesson 2 of 2
Three Accounts, How Many Sources?
Evaluate source dependence and explain what corroboration can and cannot establish.
Mr. S Teaches · Original starter mini-lesson · MS8-SOC-06Learning objective
Construct a source-dependence diagram and write a qualified historical conclusion using independent evidence.
Before you begin
- Distinguish a firsthand account from a later summary.
Gather your materials
- Paper or notebook
- Pencil and the passage, model directions or data printed in this lesson
Language to know
- corroboration
- Support for a claim from comparison with other evidence.
- independence
- A source’s information not simply being copied from another source.
- provenance
- Information about where a source came from and how it was preserved.
Understand the concept
Original simulated source packet about a fictional 1910 factory opening: A is a company press release stating that 300 people attended. B is a newspaper paragraph that copies A word for word. C is a worker’s diary describing a crowded yard but giving no number. D is a later museum caption saying “Two contemporary accounts confirm 300 attendees,” citing A and B. A and B agree, but B depends on A. C provides another viewpoint without verifying the precise count. The packet is invented for source-analysis practice, not evidence about an actual event.
Teach it step by step
- Read the source descriptions and draw arrows from copied or later accounts back to the evidence they use.
- Distinguish the count claim from the broader claim that the gathering was crowded.
- Compare the simulated primary accounts with the later museum caption and identify its reasoning error.
- Write a revised conclusion with an uncertainty statement and a request for additional independent evidence.
Make the thinking visible
Worked example or model response
A→B shows copying; A and B→D shows the caption’s dependence. Counting A and B as two independent confirmations inflates support. C may support a crowded gathering but does not confirm the number 300. A cautious conclusion is that one original numerical claim is known, while the exact count remains uncertain.
Guided practice
Together rewrite the museum caption so it accurately describes the available evidence and its limits.
Independent practice
Create the dependence diagram and write a 120-word evaluation. Identify a record that might help check attendance, such as an independently produced ticket log, and explain why its counting method would also need scrutiny.
Quick assessment
Why is agreement among five copied reports weaker than agreement among independently produced records?
Answer key & assessment criteria
Answers and teaching guidance
- Guided: A suitable caption says that a company release reported 300 attendees, a newspaper repeated it and a diary described crowding; the precise count is not independently confirmed by this packet.
- Independent: Assess correct dependence arrows, distinction of number versus crowding, primary/later comparison and a request for an independent record with a known counting method.
- Quick check: Copied reports can preserve the same original mistake; independence provides an additional check rather than repeated wording.
Look for: Look for a claim that answers this lesson’s question, accurate use of the supplied evidence and an explanation of a limit or alternative. Ask the learner to point to the detail supporting each inference.
Make it work for your learner
More support
Use source cards with copy arrows already drawn for A and B; finish the caption relationship together.
Extension challenge
Add a simulated ticket ledger showing 280 entries and debate whether entries, tickets and actual attendees count the same thing.
Selected contributions · Official sources
Standards connections
Subject-content alignment not yet verified
Supporting Common Core literacy connection
RH.6-8.9Common Core · Grades 6–8
Compare primary evidence with a later account.
Read the official standard ↗The provided social studies passage/source is explicitly analyzed in the activity. This selected literacy practice does not establish subject-content alignment or complete coverage of the standard.
Source and mapping checked 2026-11-04. This mini-lesson contributes selected skills; it does not claim full attainment.