Neil Mercer is Emeritus Professor of Education at the University of Cambridge, where he is also the Director of Oracy Cambridge: the Centre for Effective Spoken Communication and a Life Fellow of the college Hughes Hall. He was previously Professor of Language and Communications at the Open University. He is a psychologist with particular interests in the development of children’s spoken language and reasoning abilities, and the role of teachers in that development. He has worked extensively and internationally with teachers, researchers and educational policy makers. His books include Words and Minds [Palabras y Mentes]: how we use language to think together, Exploring Talk in School, Dialogue and the Development of Children’s Thinking and Interthinking: putting talk to work.