Is a government-mandated reduced-class size policy likely to improve pupils’ achievement in France? The data says oui

French pupils from disadvantaged areas demonstrate lower achievement than their more affluent peers. In an effort to close this achievement gap, the French government issued a policy in 2017 reducing Year 2 class size in high-priority educational areas to no more than 12 pupils, extending to Year 3 classes and priority educational areas in 2018. In order to provide evidence regarding the feasibility of such a policy, researchers used data from a 2003 first-grade-class-size-reduction policy in France to examine its carry-over effects into the second grade.

The 2003 study involved assigning classrooms to either small (12 pupils/class n=100 classes) or large (20–25 pupils/class, n=100 classes) class sizes. At the start of the 2002–03 school year, children were pre-tested on pre-reading skills and matched. In post-tests at the end of the school year, results favoured the small-class-size group on word reading (ES = +0.14) and word spelling (ES = +0.22). These effects are very small in light of the costs of halving class size.

The new study examined these pupils’ reading achievement at the end of Year 3, where the pupils formerly placed in smaller classrooms had been placed in full-sized classes again. Subjects were 1,264 pupils (663 in the intervention group and 601 in the control group) who had received both the initial testing in Year 2 and had test scores at the end of Year 3. Results showed that while both groups were equivalent at the start of Year 2, and by the end of the year the small-class-size group showed greater academic achievement than the control group, this gain diminished over the summer break and had completely disappeared by the end of Year 3. That is, there was no long-term impact of one year of reduced class size.

For more information, the original 2003 study was reported in Best Evidence in Brief in July.

Source: Reducing the number of pupils in French first-grade classes: Is there evidence of contemporaneous and carryover effects? (November 2018), International Journal of Educational Research, Volume 96,

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