As part of our effort to keep our online teaching resources accessible and user-friendly, we have revised and upgraded our Investigating U.S. History website. The site now has a responsive design, to make it tablet and mobile friendly, a new audio format for greater compatibility, and updated links programmed in HTML 5. Originally created in 2007 by CUNY history faculty, and supported by an NEH grant, the twelve inquiry-based activities feature primary source materials such as presidential audiotape excerpts, 1930s photographs and folk music, revolutionary war artifacts, and nineteenth-century religious tracts that challenge students to “do history.”