The Encyclopedia of Chicago provides a number of valuable references to Progressivism in the context of the Windy City, including this interactive map from Hull House of its surrounding inhabitants and their ethnicities.

You can take a virtual tour of a New York City tenement, courtesy of the Lower East Side Tenement Museum, through a downloadable Google Expeditions app.

We've got an entire learning guide on the 18th and 21st Amendments which instated Prohibition, and then took it back.

The Avalon Project at Yale Law School offers a copy of the U.S. Constitution with dates of congressional approval and ratification for each amendment, including the 19th Amendment, another Progressive Amendment.

Brown University hosts a digital archive on the temperance movement.