Progressive Era Politics Websites
Studying the Progressives
The Gilder Lehrman Institute of American History offers a number of links to primary sources on the Progressive Era.
Progressive-Era Factories
The Library of Congress has downloadable videos from inside the Westinghouse companies in 1904.
Conservation in America
The Library of Congress also offers extensive primary sources in the evolution of the Conservation Movement in the United States.
Life in New York, New York
"On the Lower East Side" provides digitized transcripts of primary sources that describe life in lower Manhattan, New York, at the turn of the 20th century.