Margaret Heritage is an independent consultant in education. For her entire career, her work has spanned both research and practice. In addition to spending many years in her native England as a practitioner, a university teacher, and an inspector of schools, she had an extensive period at UCLA, first as principal of the laboratory school of the Graduate School of Education and Information Students and then as an Assistant Director at the National Center for Research on Evaluation, Standards and Student Testing (CRESST) UCLA. She has also taught courses in the Departments of Education at UCLA and Stanford. Christine Harrison is a Professor in Science Education at King’s College London, where she works as a researcher and teacher educator. Chris’s career began in schools and developed through curriculum development projects and examining in the U.K. before she began working on her own research. Working at a prestigious university, and also spending considerable time in classrooms on research and supporting pre-service teachers, Chris began to realize that there was a gap between research ideas and practice. To that end, she has worked with many teachers, researchers and organizations helping all learn from practice-based evidence so they can understand how practice across a variety of contexts centers around the principles of the research. Her work is published in peer-reviewed journals, edited books, and practitioner journals, and she has produced several on-line courses for teachers and researchers. Chris is Associate Director (London) for the Centre for Innovation in Teacher Education and Development, w a joint institutional strategic initiative between Teachers College, Columbia University and King’s College London, committed to the principles of equity and social justice. She is also a leading STEM educationalist in Europe working at research, practice and policy level.