- Supplemental Materials (PDF 69 KB)

^{*}Sarah Quebec Fuentes, s.quebec.fuentes@tcu.edu, is an associate professor of mathematics education at Texas Christian University (TCU) in Fort Worth. She is interested in the teaching and learning of mathematics for understanding. Her research projects focus on classroom discourse, teacher knowledge, mathematics curriculum materials, teacher self-efficacy, collaboration, and developing fraction sense.

^{*}Rachael Quebec teaches first grade at Estabrook Elementary School in Lexington, Massachusettes. She is interested in teaching her students multiple strategies to solve problems, and she designs opportunities for them to explore and discover these strategies in a workshop model.

^{*}Edited by J. Matt Switzer, an assistant professor of mathematics education at TCU. Each month, this section of the Problem Solvers department features a new challenge for students. Readers are encouraged to submit problems to be considered for future columns. Receipt of problems will not be acknowledged; however, those selected for publication will be credited to the author. For submission guidelines to all departments, go to http:/www.nctm.org/WriteForTCM.