Barry Kluger-Bell is Assistant Director for Science at the Exploratorium Institute for Inquiry in San Francisco. He holds an A.B. in Physics and Mathematics from the University of California at Berkeley and a PhD in physics from the University of Colorado. Dr. Kluger-Bell has worked as a physicist, college-level physics teacher, science teacher educator, and director of the Bay Area Science Project. At the Exploratorium, he has served as science resource teacher, developed curriculum materials, planned and led workshops for teachers, professional developers, and university faculty and graduate students, and worked with elementary teachers and children in their classrooms. He is author of The Exploratorium Guide to Scale and Structure. He has served as an advisor for video projects by WGBH, Boston and Annenberg/CPB in Washington.