Primary sources are:
"...the raw materials of history — original documents and objects which were created at the time under study. They are different from secondary sources, accounts or interpretations of events created by someone without firsthand experience" ("Using Primary Sources", Library of Congress)
Why do we use primary sources?
"Examining primary sources gives students a powerful sense of history and the complexity of the past. Helping students analyze primary sources can also guide them toward higher-order thinking and better critical thinking and analysis skills" ("Using Primary Sources", Library of Congress)
Sources that derive from the time period of study, including:
Sources that refer to primary sources. They typically interpret and analyze primary sources, including: