Choosing a secondary school is one of the most consequential decisions a parent makes. The data available — league tables, Ofsted reports, Progress 8 scores — is extensive but often misunderstood.
The Key Metrics Explained
Progress 8: The government's preferred measure of school performance. It measures the progress pupils make between age 11 (KS2) and 16 (GCSE), compared with similar pupils nationally. A score of zero means pupils made average progress; positive scores indicate better-than-average progress.
Progress 8 is more informative than raw GCSE results because it controls for intake. A school in a deprived area with a Progress 8 of +0.5 may be adding more educational value than a selective school with a higher absolute attainment level.
Attainment 8: The average score across eight subjects in GCSE. Higher is better, but heavily influenced by the academic profile of the intake.
Ofsted Grades: Outstanding (1), Good (2), Requires Improvement (3), Inadequate (4). Note that Ofsted inspections are infrequent — some 'Outstanding' grades are over five years old and may not reflect current performance.
EBacc entry rate: The percentage of pupils entered for English, maths, science, history/geography, and a language. Higher rates suggest broader academic provision.
Where to Find the Data
The Department for Education's Compare School Performance tool (compare-school-performance.service.gov.uk) allows you to search any school and compare it with others. The data is updated annually following GCSE results.
What League Tables Don't Tell You
No data source captures school culture, pastoral care quality, extracurricular provision, or how an individual child will experience a particular school. Open days, conversations with current parents, and — if your child is old enough — talking to pupils themselves, add dimensions no table can capture.
