David N. Perkins is Co-director of Project Zero, Associate of the Educational Technology Center, and Senior Research Associate, all at the Harvard Graduate School of Education. Judah L. Schwartz is Professor of Engineering Science and Education at the Massachusetts Institute of Technology, and Professor of Education and Co-director at the Educational Technology Center at Harvard. Martha Stone Wiske is Co-director of the Educational Technology Center, Senior Research Associate at Project Zero, and Lecturer at Harvard. Mary Maxwell West is Senior Research Associate in the Program Evalua...