International Correspondence Schools Printery, Scranton, PA, circa 1915. (Printing plant known as Haddon Craftsmen.)

Credit: Courtesy of Millersville University, Helen A. Ganser Library, Archives and Special Collections

The International Correspondence School's printery produced instructional materials that were shipped around the country. From simple mathematics to secretarial skills and auto mechanics, the ICS was ideally structured to serve the expanding industrial workforce.