Neil Davidson is Professor Emeritus of Teaching and Learning, University of Maryland, USA, Past President of the International Association for the Study of Cooperation in Education (IASCE), and Founder of the Network of International Cooperative Learning Educators and Enthusiasts (NICLEE).

James Fey is late Professor Emeritus in the Departments of Mathematics and Teaching and Learning, University of Maryland, USA.

Charlene Beckmann is Professor Emeritus of the Department of Mathematics, Grand Valley State University, USA.