Carol Rolheiser is associate dean, Ontario Institute for Studies in Education of the University of Toronto (OISE/UT). She is a committed leader in school district and university partnerships, concentrating on teacher education reform, teacher development, school improvement, and managing educational change. Rolheiser's professional experience includes work as an elementary school teacher, district consultant, and school administrator. She has chosen a multidimensional scholarship path, but continues to be strongly based in cooperative learning, an area of research, development and teaching expertise. Rolheiser's work as a teacher, researcher, and international staff development consultant has emphasized instructional and assessment innovation, including portfolio assessment and student self-evaluation. Her work is reflected in a range of publications, including many journal articles and book chapters. She has coauthored an interactive resource book, Cooperative Learning: Where Heart Meets Mind, and edited Self-Evaluation: Helping Students Get Better At It!

Barbara Bower teaches high school English and mathematics for The Durham District School Board in Ontario, Canada. She has been using portfolio assessment with students since 1992, and has facilitated conference and workshop sessions on portfolio assessment and student self-evaluation throughout Canada, especially in Ontario, and in the United States. Bower has written a handbook for teachers on portfolio assessment in mathematics, and has coauthored a resource document outlining cooperative learning lesson ideas for teachers of senior mathematics.

Laurie Stevahn is director of Professional Development Associates, an education consulting company providing staff development for effective instruction and quality learning. She is coauthor of Cooperative Learning: Where Heart Meets Mind and works with elementary, secondary, and university educators in designing and implementing a wide range of educational innovations including portfolio assessment and student self-evaluation, critical thinking and decision making, conflict resolution and human relations, organizational development and leadership for change.