Eugenia Etkina is a Distinguished Professor at Rutgers, the State University of New Jersey. She holds a PhD in physics education from Moscow State Pedagogical University and has more than 35 years of experience teaching physics. Professor Etkina designed and now coordinates one of the largest programs in physics teacher preparation in the United States, conducts professional development for high school and university physics instructors, and participates in reforms to the undergraduate physics courses. In 1993 she developed a system in which students learn physics using processes that mirror scientific practice, Investigative Science Learning Environment (ISLE), which is described in this book. She is the lead author of the textbook College Physics: Explore and Apply and the Active Learning Guide. Professor Etkina has conducted over 130 workshops for physics instructors, and published over 100 peer-refereed articles. David T. Brookes is an Associate Professor of Physics at California State University, Chico. He has over 20 years of experience teaching physics at college level as both a graduate student teaching assistant, and as a professor. As a teacher, Prof. Brookes continuously experiments with implementing ISLE in a studio-like setting, reading extensively in educational research and thinking about how to implement those research findings in a practical way in the classroom. Gorazd Planinsic is a Professor of Physics at the University of Ljubljana, Slovenia. He has a PhD in physics from the University of Ljubljana. Professor Planinsic is co-author of more than 20 popular science articles, and a co-author of College Physics: Explore and Apply and the Active Learning Guide. He is a recipient of the GIREP medal for his contributions in Physics Education and he is a fellow of IOP.