Students must be able to relate many representations of slope to form an integrated understanding of the concept.
Courtney R. Nagle, firstname.lastname@example.org, is an assistant professor of mathematics education at Penn State Erie, The Behrend College. She is interested in the development of mathematics concepts, including the notions of slope and limit.
Deborah Moore-Russo, email@example.com, teaches in the Graduate School of Education, State University of New York (SUNY), University at Buffalo. Her primary research interests include spatial visualization, communication, and reasoning.