Yasmin B. Kafai is Professor of Learning Sciences at the University of Pennsylvania. She is the coeditor of Beyond Barbie and Mortal Kombat: New Perspectives on Gender and Gaming and coauthor of Connected Play: Tweens in a Virtual World (both published by the MIT Press). She is also coauthor of Connected Gaming.

Carrie Heeter is Professor of Serious Game Design in the Department of Telecommunication, Information Studies, and Media, and Creative Director for Virtual University Design and Technology at Michigan State University.

Jill Denner is Senior Research Associate at ETR Associates, a nonprofit agency in California.

Jennifer Y. Sun is President and a founder of Numedeon, Inc., the company that launched Whyville.net, an educational virtual world targeted at children ages 8 to 14.