This book provides science teacher educators and science educational researchers with a current overview on the roles of beliefs in science education settings. There are four focal areas in the book: an overview of this field of research, lines of research, implications for policy, and implications for educators. Within each of these areas there are specific explorations that examine important areas such as, the roles of beliefs in teaching and learning, the impact of beliefs on student achievement, and ways in which beliefs are connected to teacher actions in the classroom. Throughout all of these discussions, there is a focus on international perspectives. Those reading this book can use the research presented to consider how to confront, challenge, and cultivate beliefs during the teacher professional development process.