Students listen to a lecture in one of the prefabricated plywood buildings (often called "the shacks") that housed the Oak Lawn Avenue campus of Southwestern Medical School. Note the open doors and windows for ventilation. The student in the first row on the far side of the aisle, in the shirt with the wide horizontal stripe, is Albert D. Roberts, who would later become associate dean of Southwestern Medical School. The photo is courtesy of Albert D. Roberts, M.D.