Terry Russell is emeritus professor at the University of Liverpool. He is a psychologist by background and training with a special interest in cognitive development as applied to the learning of science at all ages, but especially the younger age range. He taught in primary and secondary special needs schools and worked as an educational psychologist before finding opportunities into move into research. He has worked in Southeast Asia and Africa and at King’s College, London and directed the Centre for Research in Primary Science and Technology at the University of Liverpool for over twenty years. He has directed national and international projects and published extensively. This book reflects his commitment to evidence-based activity that improves teachers’ and pupils’ educational experiences, where theory informs practice through practical and accessible applications.