Primary Source: created during the time period you are researching (for example, a diary, a letter, a speech from that period, etc.)
Secondary Source: is a source that was created to analyze or report on the event or time period.
Salem Press Defining Documents Series
Discovering Literature: Romantics and Victorians
National Humanities Center: America in Class
The K-12 Internet Resource Center
US Department of State: Office of the Historian
National Museum of American History
Library of Congress: Chronicling America