The Digital Public Library of America (DPLA) hosts this impressive collection of primary source sets designed to facilitate student engagement in a variety of historical and literary topics. These sets were designed by the DPLA's Education Advisory Committee, a team of K-12 and college level educators. One of the most recently added Primary Source Sets is a variety of materials related to Ralph Waldo Ellison's Invisible Man, which includes an FBI file on Ellison for the House Un-American Activities Committee (HUAC) and an audio recording of Ellison's 1966 Congressional testimony about social conditions in Harlem. Another primary source set addresses the Columbian Exchange in an excerpt from James Carrick Moore's 1815 book The History of the Small Pox and a photograph of a sweet potato plant taken in 1900. This impressive collection includes dozens of other primary source sets, including Pop Art in the US; Stonewall and its Impact on the Gay Liberation Movement; and Latin American Revolutionaries, to name just a few.