The papers in this volume show the origin and development of Bernstein's theoretical studies into the relationships between social class, patterns of language use and the primary socialization of the child. 'Bernstein's hypothesis will require [teachers] to look afresh not only at their pupils' language but at how they teach and how their pupils learn' - Douglas Barnes, "Times Educational Supplement". 'His honesty is such that it illuminates several aspects of what it is to be a genius' - Josephine Klein, "British Journal of Educational Studies".