Kim Markworth is an associate professor of mathematics education at Western Washington University, USA and a former elementary and middle-grades mathematics classroom teacher. In her current position, she works with preservice and in-service elementary and middle school classroom teachers to deepen their understanding of mathematical content and to improve their teaching practices.

Jenni McCool is an associate professor of mathematics education at the University of Wisconsin-La Crosse, USA and a former classroom teacher. She teaches a variety of content and pedagogy courses for future elementary and middle school teachers, and also works closely with many in-service teachers through professional development programs.

Jenn Kosiak is a professor of mathematics education at the University of Wisconsin-La Crosse, USA , where she teaches an array of content and pedagogy courses for future Pre-K-12 mathematics teachers. She leads many local and statewide professional development opportunities for in-service teachers as well as serves as an executive board member of the Wisconsin Mathematics Council, a state affiliate of NCTM.