I know data is only one part of the picture, but you could look at the performance tables for your local comprehensives, paying particular attention to the results by prior attainment (which is in the 'results by pupil characteristics' section.) That will show you the proportion of students at that school with high prior attainment, and how well they do at the school.
https://www.gov.uk/school-performance-tables
https://www.gov.uk/school-performance-tables
Statistics: Posted by JustOutside — Tue Jul 16, 2024 8:58 am