Small class sizes for improving student achievement in primary and secondary schools: a systematic review. This Campbell Collaboration systematic review examines the impact of class size on academic achievement. The review summarizes findings from 148 reports from 41 countries. Reducing class size is viewed by many educators as an essential tool for improving student performance, and is especially popular among teachers. But smaller class sizes come at a steep cost. Education policymakers see increasing class size as a way to control education budgets. Despite the real policy and practice implications, the research on the educational effects of class‐size differences on student performance is mixed. This meta-analysis suggests, at best only, a small impact on reading achievement. The study finds a small negative effect on mathematics. Given the fact that class size reduction is minimally effective while being costly, aren’t there better solutions that are both cost-effective, benefits students, and can help teachers be successful in a very challenging profession?
Citation: Filges, T., Sonne‐Schmidt, C. S., & Nielsen, B. C. V. (2018). Small class sizes for improving student achievement in primary and secondary schools: a systematic review. Campbell Systematic Reviews, 14(1), 1-107.