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Ability Grouping in English Secondary Schools: Effects on Attainment in English, Mathematics and Science

The impact of ability grouping on attainment is examined in a cohort of year-9 pupils in 45 mixed secondary comprehensive schools, representing a variety of grouping practices. Analyses using multilevel models reveal an effect of the extent of setting experienced by pupils on progress in mathematics, but not in English or science. In mathematics, pupils attaining higher levels at the end of year 6 make more progress in sets, whereas pupils attaining lower levels make more progress in mixed ability classes. Placement in a high, middle or low set also has a significant effect on mathematics attainment. Possible explanations are discussed and educational implications considered.