Michael Cole is an all-University of California Professor of Psychology, Communication, and Human Development. His home base is the University of California, San Diego, where he is the Director of the Laboratory of Comparative Human Cognition. For many years he has spent his afternoons participating with children and undergraduates in development-enhancing after-school programs. He is an editor of the journal, Mind, Culture and Activity. He has published widely on the role of culture and schooling in development for which he has been awarded Honorary Degrees at Copenhagen University and the University of Helsinki. He is a member of the American Academy of Arts and Sciences and the National Academies of Education (of the United States and Russia).

Sheila Cole is a former journalist who specialized in writing about families, children, development and education. She is also a children's writer. Her most recent book offers a history of American childhood and is written for young people. She has also authored picture books, historical fiction, and novels for young adults. She participates in literacy programs for homeless adolescents.

Cynthia Lightfoot is Professor of Human Development and Family Studies at Pennsylvania State University, Delaware County, and Division Head of Health and Human Development for the Commonwealth College. Her published works focus on the sociocultural contexts of child and adolescent development, particularly identity development and peer culture. She serves on the editorial boards of Culture and Psychology and Cognitive Development, and is the Vice President of the Jean Piaget Society. Her interest in children and adolescents was fueled by experiences working in schools with severely emotionally disturbed and autistic children, and as a child development specialist in a program for teenage mothers.