Primary materials need to be carefully read and interpreted. Some questions to ask include:
For more explanation on how to use and interpret primary sources see: Primary Source Analysis Tool & Guide
Primary Sources are original documents or accounts created at the time of an historical event or era. Memoirs, oral histories, and interviews are considered primary sources when they record direct eyewitness accounts to an event or era.
Types of primary sources include:
Primary sources serve as the raw material to interpret the past. They provide the resources necessary for original historical research, that is, research and analysis in your own words (hence their requirement in history projects!).
Secondary sources comment upon, explain, or interpret primary sources. They are previous interpretations by historians used to support your argument.
Together, primary and secondary sources make up the key element of quality historical research.
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Source: ALA's Reference and User Service Association