Primary sources provide first-hand testimony or direct evidence. Examples include:
- diaries or correspondence
- autobiographies and oral histories
- photographs and illustrations
- newspaper articles reporting an event
- manuscripts
- pamphlets, broadsides, or other ephemera
- census data
Secondary sources gather, interpret, and analyze primary sources. Examples include:
- A history textbook
- An encyclopedia article on immigration
- A scholarly article on healthcare reform
- A magazine articlethat usess census data to describe neighborhoods in San Francisco
- A newspapers articles synthesizing information about school funding in California