Isleworth and Syon School for Boys
Isleworth, TW7 5LJ · Hounslow · secondary school
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17th of 20 secondary schools in Hounslow we can score. Local and same-phase on purpose: a national table mostly measures who attends.
Narrow the comparison to schools whose pupils have similar backgrounds and it does better still — 6.2/10 against 856 of them, against 5.2/10 nationally. Both figures are results only, without the inspection grade. A lower figure here means a stronger comparison group, not a weaker school.
How this is worked out
| Measure | Percentile | Weight | Adds |
|---|---|---|---|
| Ofsted | 52 | 35% | 1.84 |
| Grade 5+ English & maths 2025/26 | 44.4 · 48 | 30% | 1.45 |
| Progress 8 2023/24 | 0.09 · 57 | 25% | 1.41 |
| Attainment 8 2025/26 | 46.2 · 52 | 10% | 0.51 |
Each measure is read as a position among comparable schools, so a school in the middle of the country scores 5. Full method.
Isleworth and Syon School for Boys overview
How it's doing
The school was rated Good by Ofsted in 2023. In 2024/25, 38.3% of pupils achieved Grade 5 or above in English and maths. Attainment 8 was 43.1, compared to the national median of 44.6. Progress 8 was +0.09 in 2023/24, indicating pupils did better than those nationally who started from the same place. Narrow the comparison to schools whose pupils have similar backgrounds and it does better still (5.1 out of 10 against similar schools, 4.4 out of 10 against all schools).
Beyond the classroom
Pupils can join the Duke of Edinburgh’s Award, Current Affairs Club, Creative Writing Club, and Woodworking Club. The school hosts a Summer Arts Festival. Trips include visits to botanical gardens, the South Coast, museums, the Ypres memorials, and the theatre, alongside science excursions and residential trips abroad.
Getting in
The published school roll is 951 pupils against a stated capacity of 979. These whole-school figures do not establish entry-year vacancies or the likelihood of an offer. Confirm entry-year availability and admissions criteria with the school or local authority.
Worth asking on a visit
How does the Creative Writing Club support pupils who are not yet confident in English? What support is available for pupils aiming to raise their Attainment 8
What Ofsted said about Isleworth and Syon School for Boys
Overview
Pupils are proud to be part of this “rich and inclusive school community” where they are “happy and kept safe.” The school delivers a “Good” quality of education, with leaders being “ambitious for pupils” who generally “work hard in lessons and achieve well.”
Strengths
- Pupils study an “ambitious and broad curriculum” that is “well-sequenced” to help them “learn and remember over time.”
- Teachers possess “secure subject knowledge” and deliver content with clarity, using assessment to “identify and correct” errors effectively.
- Pupils with special educational needs and/or disabilities are “quickly identified and well-supported” through appropriate adaptations and bespoke provision.
- Behaviour is described as “calm and purposeful,” with a culture where bullying is “not tolerated” and incidents are dealt with “swiftly and effectively.”
- Attendance is “very high,” supported by effective systems where leaders “follow up any issues with families.”
Areas to improve
- In a few subjects, the curriculum is “less well implemented,” with activities that do not consistently match the planned ambition.
- Assessment in these specific subjects is not used as effectively to check understanding, leading to “gaps in some pupils’ understanding.”
Safeguarding
The report states that “the arrangements for safeguarding are effective.”
Results over time
Attainment 8, the years we hold.
| Year | Attainment 8 |
|---|---|
| 2023/24 | 48.2 |
| 2024/25 | 43.1 |
| 2025/26 | 46.2 |
| England | 44.9 |
Source: DfE Explore Education Statistics. “England” is the median of the 3,682 state schools in England we hold a 2025/26 figure for — a school-level median, not the DfE's pupil-weighted national figure.
Your offer chance
—Based on official applications/offers, distance and catchment where we have it. Bands only — never a percentage.
Sibling, faith, looked-after and other criteria can override distance. Always confirm with the school or local authority.
Next dates
- Secondary application deadline31 Oct 2026
- Secondary National Offer Day1 Mar 2027
- Secondary application deadline31 Oct 2027
- Secondary National Offer Day1 Mar 2028
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