{"metric":"class_size_secondary","title":"Average secondary class size","topic":"education","unit":"pupils","measure_type":"index","geography":"E92000001","comparison_method":"previous_period","latest":{"period_start":"2025-09-01","period_end":"2026-08-31","period_label":"2025/26 academic year","value":22.615110722218482,"status":"final","vintage":"2026-08-04"},"comparison":{"period_label":"2024/25 academic year","value":22.51481516131619,"vintage":"2026-08-04"},"source":{"publisher":"Department for Education","publication":"Explore Education Statistics: absence, SEN, attainment, apprenticeships, NEET, class sizes","landing_url":"https://explore-education-statistics.service.gov.uk/","sheet":"class_size","table":"019e7401-70d1-73ca-9855-bd7258e5a1ca","row":"Size of class=Total; Type of class=Secondary","column":"Average class size","raw_value":"22.615110722218482","file_url":"https://api.education.gov.uk/statistics/v1/data-sets","file_sha256":"301a1eda429205c90247cc4efad5564351b549d7772715a628d8459e360d8b47","release_date":"2026-08-04","release_label":"Explore Education Statistics: releases to August 2026"},"definition":"The average number of pupils per class in state-funded secondary schools in England at the January census.\n","does_not_measure":"Sixth-form or vocational group sizes, which are counted differently.\n","links":{"page":"/education/class-size-secondary","series":"/api/metrics/class_size_secondary/series","vintages":"/api/metrics/class_size_secondary/vintages"}}