Chapter 13 and Chapter 25 of this book are freely available as a downloadable Open Access PDF at http://www.taylorfrancis.com under a Creative Commons Attribution-Non Commercial-No Derivatives (CC BY-NC-ND) 4.0 license.
Matthew L. Bernacki is Associate Professor of Learning Sciences and Psychological Studies and Kinnard White Endowed Scholar in the School of Education at the University of North Carolina at Chapel Hill, USA.
Candace Walkington is Professor of Mathematics Education and the Annette and Harold Simmons Centennial Chair in the Department of Teaching and Learning at Southern Methodist University, USA.
Alyssa Emery is Assistant Professor of Learning Sciences in the School of Education at Iowa State University, USA.
Ling Zhang is Assistant Professor of Special Education in the College of Education at the University of Wyoming, USA.