Ph.D. Developmental Psychology, Univ. of Alabama
Emeritus Professor, University of Massachusetts

Author of
Constructive Play: Applying Piaget in the Classroom (with Fleet Hill)
The Child's Construction of Knowledge (with David Kushner)
Cognitive Development: A Life Span Perspective (with Irving Sigel)

Co-editor of
Constructivism in the Computer Age
The 100 Languages of Children: The Reggio Emilia Approach to Early Childhood
Education (1st and 2nd Editions)
The Amusement Park for Birds (video)
The Long Jump (video)
Jed Draws His Bicycle: A Case of Drawing to Learn (video)

Past president of the Jean Piaget Society
Invented The Gravity Wall for children's museums
Founder of The School for Constructive Play
Co-founder of Videatives, Inc.

Father of Jed, Husband to Marion