Jonathan Osborne is the Shriram Family Professor of Science Education at Stanford University, USA. He started his career teaching physics in London schools before joining King's College London, UK in 1985 where he worked until 2008 before moving to Stanford.Justin Dillon is Professor of Science and Environmental Education and Head of the Science and Technology Education Group at King's College London, UK. He started his career teaching science in London schools before joining King's College London, UK in 1989. He is President of the European Science Education Research Association and an editor of the International Journal of Science Education. He is Editor of Becoming a Teacher 3e (Open… University Press, 2007).