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Potters Bar, London
St John's Preparatory and Senior School is an all-through independent school in Potters Bar, London.
Government data shown for the 2024/25 academic year
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St John's Preparatory and Senior School is an all-through independent school in Potters Bar, London. It has not yet been rated by students on y.school. Be the first to rate this independent school and help other students and parents understand what the school experience is really like.
In terms of academic performance, St John's Preparatory and Senior School has an average A-Level grade of C.
The school has 194 pupils on roll, 0% of pupils eligible for free school meals.
After leaving St John's Preparatory and Senior School, student destinations include 38% going on to university and 0% entering apprenticeships.
All student scores on y.school are calculated from anonymous ratings using a transparent, deterministic methodology. Scores are freshness-weighted (18-month half-life) and include confidence tiers based on sample size, diversity, and consistency. For full details, see the y.school methodology.
Profile completeness: 4 of 8 data domains · Partial coverage
5.9
Average
/ 10
Data Score
Computed from 6 government data points. Not based on student reviews.
Source: DfE / Ofsted · context onlyGovernment data is shown for context and does not influence the student-review Student Score. Small schools can show extreme percentages from small sample sizes.
Independent school data note
Independent schools often sit IGCSEs, which DfE performance tables don't count. Because the resulting Attainment 8 / Progress 8 / EBacc figures systematically understate actual results, they are not shown for independent schools. A-Level and destination data is unaffected and shown in the tabs above.
Latest government data shown is for the 2024/25 academic year; some figures cover earlier years.
Independent school — inspected by the ISI, not OfstedMost independent schools are inspected by the Independent Schools Inspectorate (ISI), not Ofsted, so no Ofsted rating is published here. The results and intake data above still come from the DfE.
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The area around this school
The school's Attainment 8 score is 70.1. Attainment 8 measures the average achievement of students across 8 qualifications including English, Maths, three EBacc subjects, and three open group qualifications.
100% of students at St John's Preparatory and Senior School achieved grade 4 or above in both English and Maths GCSEs.
Students at St John's Preparatory and Senior School achieve an average A-Level grade of C. This metric covers all A-Level and equivalent qualifications taken at the school.
St John's Preparatory and Senior School has 194 pupils on roll.
0% of pupils are eligible for free school meals, which is used as a proxy for socioeconomic disadvantage.
4% of pupils receive SEN (Special Educational Needs) support or have an Education, Health and Care plan.
After leaving St John's Preparatory and Senior School, 38% go on to university and 0% enter apprenticeships.
Schools like this one
Matched on the share of disadvantaged pupils plus special-needs, English-as-an-additional-language and school size — so you can compare like with like, not just by postcode.
National percentiles (100 = best) for the area around the school · 5/5 measures · Police.uk, DEFRA, NaPTAN, DfT STATS19, MHCLG IoD 2025.
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