Michael J. Gilbert, Michael.
gilbert@hawaii.edu, is with the Curriculum Research and Development Group at the University of Hawai'i Manoa. His research interests include the different ways in which students learn mathematics and the ways in which teachers learn the mathematics they teach. Jacqueline Coomes, jcoomes@mail.ewu.edu, is a secondary school mathematics educator in the mathematics department at Eastern Washington University in Cheney. She enjoys doing mathematics and researching how people learn mathematics.