St John's Preparatory and Senior School is a sixth form 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 Attainment 8 score of 70.1, 100% of students achieving grade 4+ in English and Maths, an average A-Level grade of C.
The school has 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.
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.
0% of pupils are eligible for free school meals, which is used as a proxy for socioeconomic disadvantage.
After leaving St John's Preparatory and Senior School, 38% go on to university and 0% enter apprenticeships.
Source: Department for Education, Ofsted. Data shown for context only — does not influence the Student Score.
Data last updated: April 2026
Crime Nearby
33/mo
Within ~1 mile (Police.uk)
Violent Crime
15/mo
45% of total
Air Quality
Good
NO₂: 15.1 µg/m³ · PM2.5: 7.9
Bus Stops
2
Within 500m
Source: Police.uk, DEFRA UK-Air, DfT NaPTAN. Based on the school's location — actual conditions may vary.
St John's Preparatory and Senior School has not updated their profile
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Other schools in the Potters Bar area
Independent school data note
Independent schools often use IGCSEs which are excluded from DfE performance tables. GCSE metrics may not reflect actual attainment. A-Level and destination data is accurate.
70.1
Attainment 8 Score
National average: 46.3
EBacc achieved: 40.0%
A-Level
Average Grade
C
Source: Department for Education / Ofsted. Data shown for context only — does not influence the Student Score. Small schools may show extreme percentages due to small sample sizes.