Educational implementation and teaching : 'school knowledge' and psychological theory / Michael Beveridge -- Piaget and Vygotsky : a necessary marriage for effective educational intervention / Michael Shayer -- Psychological theory that 'works' in the classroom / Kathy Sylva -- Psychological development as a social process / Gerard Duveen -- Revisiting young Jean Piaget in Neuchâtel among his partners in learning / Anne-Nelly Perret-Clermont -- Piaget, Vygotsky and the social dimension / Gerry P.T. Finn -- Piaget, mathematics and Vygotsky / Peter Bryant -- Socializing intelligence / Lauren B. Resnick and Sharon Nelson-Le Gall -- Expertise and cognitive development : seeking a connection / Robin N. Campbell -- Measuring development : examples from Piaget's theory / Trevor G. Bond -- Capturing dynamic structuralism in the laboratory / Margaret Chalmers and Brendan McGonigle -- Why measure development? / James Ridgway -- Children's understanding of permission and obligation / Paul Harris and Maria Núñez -- Necessary knowledge and its assessment in intellectual development / Leslie Smith -- Modality and modal reasoning / Peter Tomlinson -- The view from giants' shoulders / Deanna Kuhn.