Chislehurst and Sidcup Grammar School
similar schools
Chislehurst and Sidcup Grammar School is a converter academy in Sidcup for boys and girls aged 11 to 18. It has 1,561 pupils, 217 more than it has places for. About 2 in every 100 pupils come from a low-income family, far fewer than at most schools in England. We give it 96 out of 100. That puts it well above schools like it, ahead of 60% of the 50 schools most like it. Ofsted's last grade was good, back in 2022.
Hurst Road, Sidcup, DA15 9AG020 8302 6511csgrammar.comMr Nigel Walker headteacherAll details
What Ofsted found
A shorter visit on 14 December 2022 found nothing to change the school's grade. Read the report on Ofsted's website.
Good overall. A shorter follow-up visit found nothing to change that. The last full inspection was before September 2019, which is as far back as Ofsted's public records go, so we can't show its date or the grades for each area.
Results
GCSE results, summer 2025
189 pupils sat their GCSEs. Here is how they did against every state secondary in England.
All GCSE measures, year by year
| Measure | 2025 | 2024 | 2023 | 2022 | 2019 | 2018 | Bexley | England |
|---|---|---|---|---|---|---|---|---|
| Pupils at the end of Year 11 | 189 | 190 | 191 | 201 | 203 | 190 | – | – |
| Average GCSE scoreAttainment 8 | 75.6 | 76.0 | 73.0 | 75.0 | 72.1 | 70.3 | 51.0 | 46.8 |
| Progress from age 11Progress 8 | – | +0.82 | +0.46 | +0.41 | +0.43 | +0.39 | – | – |
| Strong pass in English and mathsGrade 5+ in English and maths | 99% | 97% | 97% | 97% | 96% | 95% | 54% | 46% |
| Standard pass in English and mathsGrade 4+ in English and maths | 100% | 100% | 99% | 100% | 98% | 98% | 71% | 66% |
| Core subjects scoreEBacc average point score | 7.47 | 7.39 | 7.12 | 7.29 | 6.87 | 6.51 | 4.53 | 4.15 |
| Taking the core subjectsEBacc entry | 96% | 98% | 95% | 95% | 93% | 87% | 41% | 41% |
| Average GCSE score: low-income pupilsAttainment 8, disadvantaged | 64.8 | 72.9 | 72.1 | 68.3 | 72.5 | 69.5 | – | – |
| Average GCSE score: other pupilsAttainment 8, non-disadvantaged | 76.3 | 76.2 | 73.0 | 75.6 | 72.1 | 70.3 | – | – |
| Average GCSE score: pupils who started aheadAttainment 8, high prior attainers | – | 76.5 | 73.2 | 76.2 | 72.5 | 70.7 | – | – |
Subjects
Results came out for 22 GCSE subjects in 2025. Each figure is the share of pupils who got a grade 5 or better, next to the average for state secondaries in England.
Strongest subjects
The small number is how many pupils sat each subject. Subjects with fewer than six pupils aren't published.
Every subject against England, 2025
| Subject | Entries | Grades 9 to 7 | Grades 9 to 5 | Grades 9 to 4 | England 9 to 5 | Rank in England |
|---|---|---|---|---|---|---|
| Religious Studies | 188 | 50% | 87% | 97% | 60% | 170 of 1,825 |
| Mathematics | 188 | 89% | 100% | 100% | 53% | 22 of 3,211 |
| English Language | 188 | 67% | 98% | 100% | 54% | 33 of 3,210 |
| English Literature | 187 | 65% | 98% | 100% | 58% | 43 of 3,202 |
| Latin | 113 | 82% | 97% | 98% | 82% | 17 of 68 |
| History | 109 | 55% | 95% | 96% | 52% | 75 of 3,126 |
| Combined Science | 96 | 72% | 98% | 100% | 36% | 13 of 3,084 |
| Chemistry | 92 | 89% | 99% | 100% | 81% | 425 of 2,537 |
| Biology | 92 | 82% | 99% | 99% | 82% | 368 of 2,570 |
| Physics | 92 | 88% | 98% | 100% | 82% | 525 of 2,546 |
| Geography | 86 | 70% | 97% | 99% | 51% | 83 of 3,116 |
| Computer Science | 81 | 74% | 98% | 99% | 56% | 43 of 1,861 |
| Design & Technology | 44 | 71% | 98% | 100% | 50% | 48 of 1,478 |
| German | 43 | 54% | 95% | 100% | 63% | 40 of 571 |
| Physical Education | 36 | 44% | 97% | 100% | 56% | 38 of 1,559 |
| Art and Design | 29 | 79% | 97% | 97% | 58% | 81 of 2,818 |
| Classical Civilisation | 29 | 48% | 93% | 97% | 58% | 4 of 45 |
| French | 27 | 78% | 96% | 96% | 60% | 63 of 1,974 |
| Drama | 25 | 88% | 100% | 100% | 60% | 5 of 844 |
| Food Preparation & Nutrition | 18 | 89% | 100% | 100% | 52% | – |
| Music | 12 | 75% | 92% | 100% | 61% | – |
| Other Modern Languages | 7 | 0% | 0% | 0% | 49% | – |
In combined science each pupil gets two grades and we count the lower one. Rankings only include state secondaries where 20 or more pupils sat the subject.
A level and sixth-form results, 2025
261 students finished sixth-form courses.
All sixth-form measures, year by year
| Measure | 2025 | 2024 | 2023 | 2022 | 2019 | 2018 |
|---|---|---|---|---|---|---|
| Students | 261 | 243 | 250 | 230 | 429 | 413 |
| Average A level points per entryA level APS per entry | 41.22 | 41.49 | 40.82 | 45.00 | 33.51 | 34.93 |
| Average A level grade | B | B | B | A- | C+ | C+ |
| Best three A levelsBest 3 A levels APS | 41.32 | 41.42 | 40.53 | 44.92 | 34.43 | 36.97 |
| AAB or better in subjects universities likeAAB+ in two facilitating subjects | 27% | 30% | 26% | 30% | 12% | 19% |
| A level progressA level value added | +0.02 | -0.01 | – | – | -0.19 | -0.17 |
| Stayed and finishedRetained and assessed | 99% | 98% | 96% | 98% | 98% | 99% |
A level subjects
22 A level subjects had results in 2025. Each figure is the share of students who got an A* to B, next to the average for state sixth forms in England. When only a handful of students take a subject, its figures jump around from year to year.
Strongest A levels
Every A level subject against England, 2025
A levels only. BTECs, T levels and other courses are in the table above. Subjects with fewer than five students aren't published.
Does every child do well here?
A good school does well by every child, not just on average. Each row compares two groups of pupils here. The grey marks show the same two groups across England. 2 of the 3 gaps are smaller than the gap across England. When a group has fewer than about ten pupils, its figures jump around a lot from year to year.
At GCSE, 2025
Low-income means the child has had free school meals at some point in the last six years. A group's figure isn't published when it has fewer than six pupils.
Getting a place
Grammar school. This is a grammar school, so places depend on an entrance test.
The school is full, with 17 more pupils than it has places for. More families apply than can get in, so things like how close you live and whether an older brother or sister is already here decide who gets a place. Pupil numbers have grown by 6% since 2021/22, so places are getting harder to come by.
Each council publishes its own figures on how many families applied and how far away the last child to get a place lived. We are adding councils one at a time. If you have a link to Bexley council's admissions booklet, send it to us.
Who goes here
Who a school teaches matters. That is why our score compares it with schools that take in a similar mix of children, not with every school in the country.
The most common needs among pupils getting extra support: Autistic spectrum disorder (12), language and communications needs (2), Multi-sensory impairment (1), emotional and mental health (1), Vision impairment (1).
How the mix of pupils has changed
| Census | 2026 | 2025 | 2024 | 2023 | 2022 | 2021 |
|---|---|---|---|---|---|---|
| Pupils on roll | 1,561 | 1,517 | 1,457 | 1,445 | 1,440 | 1,433 |
| Pupils from low-income familiesFree school meals | 4% | 3% | 3% | 3% | 4% | 3% |
| Pupils learning EnglishEnglish as an additional language | 12% | 11% | 9% | 9% | 8% | 7% |
| Pupils getting extra supportSEN support | – | 1% | 1% | 1% | 1% | 0% |
| Pupils with an EHC planEducation, health and care plans | – | 1% | 0% | 0% | 0% | 0% |
Attendance and behaviour
In 2024/25 pupils were in school 96.2% of the time. Across similar schools in England it was 91.4%.
Attendance year by year
| Measure | 2024/25 | 2023/24 | 2022/23 | 2021/22 | 2020/21 | 2018/19 | England |
|---|---|---|---|---|---|---|---|
| Sessions missedOverall absence | 3.8% | 4.1% | 4.5% | 4.6% | 2.4% | 3.2% | 8.6% |
| Missed with permissionAuthorised absence | 3.0% | 3.5% | 3.9% | 4.2% | 2.1% | 2.8% | – |
| Missed without permissionUnauthorised absence | 0.8% | 0.7% | 0.6% | 0.5% | 0.3% | 0.5% | – |
| Pupils missing a lot of schoolPersistent absence | 4.9% | 7.1% | 7.5% | 7.0% | 2.8% | 5.1% | 23.9% |
| SuspensionsSuspension rate | 1.6 | 1.0 | 2.8 | 3.0 | 1.5 | – | – |
| Permanent exclusionsPermanent exclusions | 0 | 0 | 0 | 0 | 0 | – | – |
What pupils do next
After GCSEs
Where the 191 pupils who left in 2022/23 were a year later.
Earlier years
| Destination | 2022/23 leavers | 2021/22 leavers | 2020/21 leavers | 2019/20 leavers |
|---|---|---|---|---|
| Still in education, work or training | 98% | 99% | 99% | 99% |
| Education | 98% | 99% | 98% | 99% |
| Apprenticeship | 1% | 1% | 1% | 0% |
| Work | 0% | 0% | 0% | – |
| Not in education, work or training | 1% | 1% | 0% | – |
After sixth form
Where the 246 pupils who left in 2022/23 were a year later.
Among pupils from low-income families it was 85%, compared with 91% for everyone else.
Where the ones heading for university went
Among students from low-income families, 94% went on to degree-level study or training and 35% to a top-third university.
Earlier years
| Destination | 2022/23 leavers | 2021/22 leavers | 2020/21 leavers | 2019/20 leavers |
|---|---|---|---|---|
| Still in education, work or training | 91% | 94% | 92% | – |
| Education | 74% | 68% | 76% | – |
| Apprenticeship | 6% | 7% | 5% | 4% |
| Work | 11% | 19% | 11% | – |
| Not in education, work or training | 7% | 4% | 5% | – |
Staff and money
From the government's count of school staff in November 2025 and the school's published accounts.
Money
From the academy accounts return, year to August 2025. The per-pupil figures are compared with other secondary schools in England that report their accounts the same way.
Reserves are the money left over at the end of the year, kept back for emergencies and big projects. Being in the red year after year is a warning sign. Very large reserves can mean money sitting in the bank instead of being spent on today's pupils. Academy figures are rounded to the nearest £1,000 and include a share of any money the trust holds centrally.
The area around the school
Crime figures come from police.uk. The police record each crime at the nearest of a fixed set of map points rather than the exact spot, so “within 500 m” is only rough. House prices are from HM Land Registry sales nearby over the last two years.
Nearby schools
The closest secondary schools, nearest first. Hover over a row to see it on the map.
| School | Type | Distance | Pupils | Ofsted | Score | |
|---|---|---|---|---|---|---|
| Hurstmere School | Academy | 550 m | 893 | Requires improvement 2022 | 5 | Compare |
| Cleeve Park School | Academy | 0.7 miles | 994 | Good 2024 | 34 | Compare |
| Blackfen School for Girls | Academy | 0.9 miles | 1,324 | No overall grade 2025 | 33 | Compare |
| Bexley Grammar School | Academy (grammar) | 1.4 miles | 1,504 | Outstanding 2022 | 97 | Compare |
| Chislehurst School for Girls | Academy | 1.4 miles | 1,227 | Good 2023 | 70 | Compare |
| Kemnal Technology College | Academy | 1.7 miles | 439 | No overall grade 2025 | 2 | Compare |
| Townley Grammar School | Academy (grammar) | 1.7 miles | 1,669 | Outstanding 2023 | 98 | Compare |
| Harris Academy Falconwood | Academy | 1.7 miles | 1,295 | Good 2019 | 59 | Compare |
Compared with schools like it
Our score compares Chislehurst and Sidcup Grammar School with the 50 schools in England whose pupils are most like its own. We match on family income, how many children are learning English, special needs, the neighbourhood, the size of the school and how it admits pupils. Those 50 schools are dotted all over the country, so we don't list them. What matters is where this school sits among them.
How the score was worked out
The score is out of 100. A 96 means that once everything below is added up, this school comes out ahead of 96% of secondary schools in England. Results bounce around from year to year, especially in small schools, so we also show a likely range: 94 to 98. Every part is judged against schools with a similar mix of pupils. For small schools we pull each part towards the group average, so one unusual year can't swing the score too far.
| What we looked at | How much it counts | Against schools like it | Effect on the score | Based on |
|---|---|---|---|---|
| Results over three years | 20% | well above | +0.59 | 2025, 2024 and 2023 results; 189 pupils |
| Ofsted inspection | 18% (normally 20%, cut because the inspection is old) | in line | +0.02 | Ofsted grade, 3.7 years old |
| Progress pupils make | 20% | well above | +0.33 | DfE progress measure; 189 pupils |
| Direction of travel over five years | 10% | above | +0.08 | results and attendance rising year on year |
| Attendance and behaviour | 10% | well above | +0.19 | 2024/25; 987 pupils |
| Results, allowing for the mix of pupils | 10% | above | +0.07 | Attainment relative to schools with a similar intake; 189 pupils |
| What pupils do next | 5% | well above | +0.07 | 191 pupils |
| What parents say | 0% | no data | – |
Worked out on 13 September 2026 (method v1). Read how the score works, including every weight and the checks we run. Think a number is wrong? Tell us.
Questions parents ask
Is Chislehurst and Sidcup Grammar School a good school?
Yes, going by the figures. Chislehurst and Sidcup Grammar School scores 96 out of 100. That is well above schools that take in a similar mix of pupils, and ahead of 60% of the 50 schools most like it in England. The score could fairly be anywhere from 94 to 98, so a few points either way between schools doesn't mean much.
What is Chislehurst and Sidcup Grammar School's Ofsted rating?
Ofsted rated Chislehurst and Sidcup Grammar School good at its last full inspection on 14 December 2022.
How good are Chislehurst and Sidcup Grammar School's GCSE results?
In summer 2025, 99% of pupils got a grade 5 or better in both English and maths. Across England it was 46%. Its Attainment 8 score, which is the average grade across a pupil's best eight subjects times ten, was 75.6, against 46.8 for England. In each subject, pupils here finished most of a grade ahead of children across England who started secondary school at the same level.
How many pupils does Chislehurst and Sidcup Grammar School have?
1,561 pupils aged 11 to 18 were on the roll in January 2026. It has 1,344 places, so it is 116% full.
Is Chislehurst and Sidcup Grammar School oversubscribed?
Probably. The school was full in 2024/25, with 17 more pupils than places. How close you live, and the school's other admissions rules, decide who gets in.
Does Chislehurst and Sidcup Grammar School have an entrance exam?
Yes. It is a grammar school, so places depend on an entrance test, usually sat in September of Year 6. Check the school's admissions page for the test dates and the pass mark.
What is attendance like at Chislehurst and Sidcup Grammar School?
Pupils were in school 96.2% of the time in 2024/25. Similar schools in England managed 91.4%. 5% of pupils missed at least a tenth of the year.
How big are the classes at Chislehurst and Sidcup Grammar School?
The average class had 28.7 pupils in January 2026. Across England it was 22.8. 23% of classes had more than 30 pupils.
Does Chislehurst and Sidcup Grammar School have a sixth form?
Yes. The average A level grade in 2025 was B. 22 A level subjects had results in 2025; the full list is in the results section.
These answers come straight from the figures on this page and update when new data comes out.
Contact and details
- Address
- Hurst Road, Sidcup, DA15 9AG
- Telephone
- 020 8302 6511
- Website
- www.csgrammar.com
- Headteacher
- Mr Nigel Walker
- Type of school
- Converter academy (Academy converter, academies)
- Phase
- Secondary school, ages 11-18, with sixth form
- Gender
- Mixed
- Single-academy trust
- Chislehurst and Sidcup Grammar School (1 schools)
- Local authority
- Bexley
- Ward
- Blendon & Penhill
- Constituency
- Old Bexley and Sidcup
- Setting
- Urban: Nearer to a major town or city
- Opened
- 1 September 2011 (academy converter)
- URN
- 137423 · LAESTAB 3034009 · UKPRN 10035164
- Formerly
- Chislehurst and Sidcup Grammar School
Recent changes
- New KS4 results for 2024/25
Where these figures come from
- School details: Department for Education, Get Information About Schools, refreshed daily (this page rebuilt 13 September 2026).
- Inspections: Ofsted management information, monthly; latest publication in our data 27 August 2026.
- GCSE results: DfE key stage 4 performance tables, 2024/25 final.
- Attendance: DfE pupil absence in schools in England, 2024/25 full year.
- Pupil characteristics: DfE school census, January 2026.
- Staff: DfE school workforce census, November 2025.
- Class sizes: DfE schools, pupils and their characteristics, January 2026.
- Pupil premium: DfE allocations and conditions of grant, 2026 to 2027.
- Money: DfE financial benchmarking and insights tool, academy accounts return 2024/25.
- A level subjects: DfE A level and other 16 to 18 results, subject entries and grades, 2024/25.
- Neighbourhood: police.uk street-level crime, HM Land Registry price paid data, NaPTAN bus stops, English Indices of Deprivation 2025.
- All under the Open Government Licence v3.0. Full list and update calendar.