Alan Schoenfeld is a Distinguished Professor of Education and Mathematics at the University of California, Berkeley, USA.Heather Fink is a postdoctoral researcher at Portland State University, USA.Sandra Zuñiga-Ruiz is an Assistant Professor in the Teacher Education Department at San José State University, USA.Siqi Huang is a PhD student in the Graduate Group of Science and Mathematics Education (SESAME program) at the University of California, Berkeley, USA. Xinyu Wei is a Master’s student studying Learning Sciences at the University of California, Berkeley, USA.Brantina Chirinda is a Mathematics and Mathematics Education Lecturer in the Faculty of Education at Cape Peninsula University of Technology, South Africa.