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Ireson, Judith and Hallam, Susan and Hurley, Clare (2005) What are the effects of ability grouping on GCSE attainment? British Educational Research Journal, 31 (4). pp. 313-328. ISSN paper 0141-1926 electronic 1469-3518
Ireson, Judith and Hallam, Susan and Hurley, Clare (2001) Ability grouping in Secondary School: Effects at Key Stage 4. The Nuffield Foundation.