Education Endowment Foundation:Reducing class size
Reducing class size
Low impact for very high cost based on very limited evidence
Reducing class size is an approach to managing the ratio between pupils and teachers
Implementation costThe cost estimates in the Toolkits are based on the average cost of delivering the intervention.
Evidence strengthThis rating provides an overall estimate of the robustness of the evidence, to help support professional decision-making in schools.
Impact (months)The impact measure shows the number of additional months of progress made, on average, by children and young people who received the intervention, compared to similar children and young people who did not.