Achievement Effects of Ability Grouping in Secondary Schools: A Best-Evidence Synthesis

  title={Achievement Effects of Ability Grouping in Secondary Schools: A Best-Evidence Synthesis},
  author={Robert E. Slavin},
  journal={Review of Educational Research},
  pages={471 - 499}
  • R. Slavin
  • Published 1 September 1990
  • Education
  • Review of Educational Research
This article reviews research on the effects of ability grouping on the achievement of secondary students. Six randomized experiments, 9 matched experiments, and 14 correlational studies compared ability grouping to heterogeneous plans over periods of from one semester to 5 years. Overall achievement effects were found to be essentially zero at all grade levels, although there is much more evidence regarding Grades 7–9 than 10–12. Results were similar for all subjects except social studies, for… 

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