Dr. Stiff is the associate dean of faculty and academic affairs and a professor of mathematics education. As such, he has taught courses in mathematics and mathematics education, including uses of technology in teaching mathematics, and the mathematics education of African-American children. Dr. Stiff's research and other professional activities have focused on teaching strategies, problem solving, the mathematics education of African-American children, and uses of instructional technologies in mathematics teaching. His research methodologies include experimental design, surveys and interviews, and classroom-based investigations.