David Oliver (D. O.) McCullough holds a Ph.D. from the University of Wisconsin-Madison’s Science Education program in the Department of Curriculum and Instruction. His research explores the history of educators and educational programs in American science museums, focusing on their respective influence on the development of science museums as institutions. His dissertation is a historical case study of teacher support programs offered at the American Museum of Natural History in New York City from 1880 to 1962, which illuminates the central role that school administrators and educators played in building the museum’s status as an authority on classroom instructional methods. He has also conducted research on the history of educational programs at the Franklin Institute’s science museum, including those programs created through unique collaborations between educators, corporate leaders, and industrial scientists and engineers. Prior to becoming a historian, he worked as an informal science educator in several museums and nature centers. He holds a bachelor’s degree in marine and environmental science from Hampton University in Virginia, and a master’s degree in education from the University of Pennsylvania.