LESSON 2.1 · SS.3.A.1.1–SS.3.A.1.3
Think Like a Historian
Learning goal: Use primary and secondary sources to answer questions about the past.
What to know
- A primary source was created by someone who experienced the time or event; examples include letters, photographs, artifacts, and interviews.
- A secondary source explains the past later, often by combining several sources.
- Historians compare sources, notice point of view, and support conclusions with evidence.
- Digital collections can help locate sources, but the source and its context still matter.

A historical photograph is a primary source. Ask: Who made it, when, what can we observe, and what can it not tell us?
Library of Congress · public domain · image source ↗Use the evidence
A 1904 photograph of new arrivals is a primary source. A modern textbook chapter explaining immigration is a secondary source. Together they answer different questions.
WATCH & NOTICE
The Immigration History of the United States
From Knowledgia
Look for push and pull factors, then compare the video’s explanation with the historical photograph.
Open video on YouTube ↗