Chislehurst and Sidcup Grammar School
Sidcup, DA15 9AG · Bexley · Grammar school
Check the area around this school
3rd of 16 secondary schools in Bexley we can score. Local and same-phase on purpose: a national table mostly measures who attends.
Narrow the comparison to the 104 schools whose pupils have similar backgrounds — a tougher field — and it places 6.1/10 among them, against 9.7/10 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 | 97.5 · 98 | 30% | 2.94 |
| Progress 8 2023/24 | 0.82 · 94 | 25% | 2.36 |
| Attainment 8 2025/26 | 75.3 · 98 | 10% | 0.98 |
Each measure is read as a position among comparable schools, so a school in the middle of the country scores 5. Full method.
Chislehurst and Sidcup Grammar School overview
How it's doing
The school was rated Good by Ofsted in 2023. In 2024/25, 98.9% of pupils achieved Grade 5 or above in English and maths. Attainment 8 was 75.6, compared to the national median of 44.6. Progress 8 was +0.82 in 2023/24, indicating pupils did better than those nationally who started from the same place. Narrow the comparison to the schools whose pupils have similar backgrounds — a tougher field — and it places 7.2 out of 10 among them, against 9.7 out of 10 nationally.
Beyond the classroom
Pupils can join clubs including The Computer Science Society, The Debating Society, The Engineering & Design Society, The Law Society, The Medical Society, The Pol-Econ Society, The Marketing Team, and C.O.R.E. Sports options include Athletics, Badminton, Cricket, Dance, Netball, Rugby, and Tennis. One-to-One Music Lessons are also available.
Getting in
The published school roll is 1,561 pupils against a stated capacity of 1,344. 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
What support is available for pupils aiming to improve their Progress 8 scores? How are one
What Ofsted said about Chislehurst and Sidcup Grammar School
Overview
Chislehurst and Sidcup Grammar School continues to be a good school, where pupils enjoy attending and benefit from a broad curriculum and extensive extra-curricular opportunities. Leaders maintain high expectations for conduct and achievement, fostering an environment where students are polite, hardworking, and proud of their work. The school provides strong support for personal development, careers, and well-being, ensuring pupils feel safe and valued.
Strengths
- Pupils demonstrate "exemplary" behaviour, with bullying incidents being rare and addressed quickly.
- The curriculum is "ambitious" and logically sequenced, helping pupils build knowledge over time in many subjects.
- Leaders provide effective careers provision that meets the Baker Clause and Gatsby benchmarks, including support for university applications.
- Staff are well trained to support pupils pastorally, with sixth-form students acting as mental health ambassadors.
- The ‘respect curriculum’ is considered by pupils to be "relevant and helpful" for their personal development.
Areas to improve
- Leaders should ensure teachers consistently check understanding and address gaps in knowledge, as sometimes pupils’ misconceptions are not successfully addressed.
- Leaders should develop systems to regularly check that strategies for pupils with special educational needs and/or disabilities (SEND) are effective and used consistently by staff.
Safeguarding
The arrangements for safeguarding are effective, with secure systems in place to identify and support pupils’ needs, and staff who are well trained and vigilant in reporting concerns.
Results over time
Attainment 8, the years we hold.
| Year | Attainment 8 |
|---|---|
| 2023/24 | 76.0 |
| 2024/25 | 75.6 |
| 2025/26 | 75.3 |
| 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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