History Matters, from the American Social History Project / Center for Media and Learning (City University of New York, Graduate Center) and the Center for History and New Media (George Mason University). Among its many resources are:
Many Pasts (excerpts from over 900 primary sources)
Digital Blackboard (web-based activities)
Search Page See "Development of the Industrial US, 1870-1900" and "Emergence of Modern America, 1890-1930."
Digital History, from the University of Houston, the Gilder Lehrman Center for American History, the National Park Service, et al. Among its many resources are:
Hypertext History: An Online American History Text (ch. 27-38)
Teacher Resource Guides (see 1877-1900 and 1900-1929)
History Reference Room
Learn About the Gilded Age
Ethnic America
The Life Stories of Undistinguished Americans: As Told by Themselves (1906)
Library of Congress: American Memory (primary documents, images, and media)
Collections: 1850-1899 - 80 collections, including:
Chicago Anarchists on Trial: Evidence from the Haymarket Affair, 1886-1887
The Spanish-American War in Motion Pictures
The Evolution of the Conservation Movement, 1850-1920
Votes for Women, 1848-1921
By Popular Demand: "Votes for Women" Suffrage Pictures, 1850-1920
The African-American Experience in Ohio, 1850-1920
Touring Turn-of-the-Century America, 1880-1920
Poet At Work: Recovered Notebooks from the Thomas Biggs Harned Walt Whitman Collection
Collections: 1900-1929 - 72 collections, including:
The Emergence of Advertising in America, 1850-1920
Inventing Entertainment: The Motion Pictures and Sound Recordings of the Edison Companies
Theodore Roosevelt on Film
America at Work, America at Leisure: Motion Pictures from 1894-1915
Inside an American Factory: Films of the Westinghouse Works, 1904
Before and After the Great Earthquake and Fire: Early Films of San Francisco, 1897-1916
American Memory Timeline (Teacher Resources)
Rise of Industrial America, 1876-1900 (seven topics with overview and primary documents)
Progressive Era to New Era, 1900-1929 (seven topics with overview and primary documents)
Using Primary Sources in the Classroom
Why Use Primary Sources? (two-page pdf handout)
Lesson Plans (scroll down)
Collection Connections
The Life of a City: Early Films of New York
The Spanish American War in Motion Pictures
Immigration: The Changing Face of America
Chicago Anarchists on Trial: Evidence from the Haymarket Affair, 1886-1887
The Chinese in California, 1850-1925
Edward S. Curtis' The North American Indian: Photographic Images
By Popular Demand: "Votes for Women" Suffrage Pictures, 1850-1920
Votes for Women: Selections from the National American Woman Suffrage Association Collection, 1848-1921
First-Person Narratives of the American South, 1860-1920
History of the American West
National Archives: Digital Classroom - Teaching with Documents Lesson Plans
The Development of the Industrial United States, 1870-1900 (eight lessons)
The Emergence of Modern America, 1890-1930 (eight lessons)
Smithsonian Institution (online exhibitions)
Making of America (digital collections of 19th and early 20th c. books and periodicals)
Making of America, from the University of Michigan Libraries
Making of America, from Cornell University Libraries
Internet Documentaries, from the Dept. of History, Ohio State University
Coal Mining in the Gilded Age and Progressive Era
Labor-Management Conflict in American History
The Strike at Homestead, 1892
Child Labor and Child Labor Reform in American History
Immigration at the Turn of the 20th Century
Lynching in America
The Era of William McKinley
Cartoons of the Gilded Age and the Progressive Era
Thomas Nast
HarpWeek: Harper's Weekly, 1857-1912
Harper's Weekly Political Cartoon Archive (topic browse page)
The World of Thomas Nast
19th-Century Advertising in Harper's Weekly
Immigrant and Ethnic America in Harper's Weekly
The American West, 1857-1916, in Harper's Weekly
The Presidential Elections, 1860-1929, as reported in Harper's Weekly
Finding Precedent: Hayes vs. Tilden - The Electoral College Controversy of 1876-1877
Coffin Nails: The Tobacco Controversy in the 19th Century, from the pages of Harper's Weekly
Business Machines, 1857-1912, from the pages of Harper's Weekly
BoondocksNet.com, by Jim Zwick
Bread and Roses: Poetry and History of the American Labor Movement
"The Man with the Hoe": Labor and Society Debated
Anti-Imperialism in the United States, 1898-1935
Mark Twain on War and Imperialism
"The White Man's Burden" and Its Critics
Sentenyaro/Centennial: The Philippine Revolution and the Philippine-American War
World's Fairs and Expositions: Defining America and the World, 1876-1916
American Experience (WGBH/PBS; teacher resources, historical overviews, timelines, transcripts, audio-visual galleries)
Reconstruction: The Second Civil War
Transcontinental Railroad
The Great Transatlantic Cable
TR: The Story of Theodore Roosevelt
America 1900
The Rockefellers
The Richest Man in the World: Andrew Carnegie
Edison's Miracle of Light
The Telephone
New York Underground
The Wizard of Photography (George Eastman)
New York Underground
Chicago: City of the Century
Coney Island
American Studies at the University of Virginia
The Fall of Third Parties in the Gilded Age
Uniting Mugwumps and the Masses: Puck's Role in Gilded Age Politics
The World's Columbian Exposition of 1893
Edward Curtis: Selling the North American Indian
Class and Leisure at America's First Resort: Newport, Rhode Island, 1870-1914
American Literature Pages, from Prof. Donna Campbell, Dept. of English, Washington State University; including
Brief Timeline of American Literature & Events
American Authors
Google Directories: U.S. History & Literature
Labor Movement
Spanish-American War
Philippine-American War
American Literature: 19th Century
American Literature: 20th Century
MUSIC (sites with audio clips)
Parlor Songs, 1800s-1920s: In Search of American Popular Song (with audio clips)
Popular Songs, 1890-1910
Popular Songs, 1910-1920
Tin Pan Alley
Political Songs in America: Pt. I, 1840-1892
Political Songs in America, Pt. II, 1893-1920
Public Domain Music, with lyrics and audio clips
Music from 1866-1899
Music from 1900-1922
Ragtime Piano MIDI Library, by John Roache
The Red Hot Jazz Archive: A History of Jazz before 1930, from Scott Alexander
Women Suffrage Songs, from Suffragists Speak: 1910-1920: A Multimedia Resource, from the University of California, Berkeley
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