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Isleworth, London
St Mary's Catholic Primary School, Isleworth is a primary voluntary-aided school in Isleworth, London.
Government data shown for the 2024/25 academic year
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St Mary's Catholic Primary School, Isleworth is a primary voluntary-aided school in Isleworth, London. It has not yet been rated by students on y.school. Be the first to rate this voluntary-aided school and help other students and parents understand what the school experience is really like.
In terms of academic performance, St Mary's Catholic Primary School, Isleworth has 86% of pupils meeting the expected standard in reading, writing, and maths at KS2.
The school has 209 pupils on roll, a teacher turnover rate of 20.9%, spending £6,991 per pupil, 8% of pupils eligible for free school meals.
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: 7 of 8 data domains · Comprehensive profile
6.5
Above Average
/ 10
Data Score
Computed from 19 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.
Latest government data shown is for the 2024/25 academic year; some figures cover earlier years.
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The area around this school
At St Mary's Catholic Primary School, Isleworth, 86% of pupils met the expected standard in reading, writing, and maths combined at the end of Key Stage 2.
88% met the expected standard in reading and 95% in maths.
The teacher turnover rate at St Mary's Catholic Primary School, Isleworth is 20.9%. This measures the percentage of teachers who left the school in the past year.
The school spends £6,991 per pupil annually.
St Mary's Catholic Primary School, Isleworth has 209 pupils on roll.
8% of pupils are eligible for free school meals, which is used as a proxy for socioeconomic disadvantage.
18% of pupils receive SEN (Special Educational Needs) support or have an Education, Health and Care plan.
St Mary's Catholic Primary School, Isleworth was rated "Good" by Ofsted following an inspection in June 2022 (3 years ago). Based on Ofsted's inspection cycle, St Mary's Catholic Primary School, Isleworth is due for reinspection this year (2026).
A "Good" rating means Ofsted found the school provides a high standard of education across all areas assessed. It has historically been the most common Ofsted rating.
Note: From November 2025, Ofsted replaced single-word judgements with detailed report cards covering multiple categories. While St Mary's Catholic Primary School, Isleworth's rating shown above was awarded under the previous system, Ofsted now provides more granular assessments. For the most up-to-date inspection information, check the school's report card on the Ofsted website.
Ofsted data is shown for context only and does not influence the Student Score. For the official report, visit reports.ofsted.gov.uk.
In context — vs similar-intake schools
Top 25% for its intakeSt Mary's Catholic Primary School, Isleworth is in the top 25% for KS2 results (reading, writing & maths) among schools with a similar intake (8–13% of pupils eligible for free school meals).
Compared with 2,752 schools nationally that have a similar share of disadvantaged pupils (8–13% of pupils eligible for free school meals). Raw league-table positions are heavily shaped by intake; this comparison isolates how a school performs relative to others facing similar circumstances. Source: Department for Education.
See the schools that most outperform their intakeSchools 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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