Chislehurst and Sidcup Grammar School
School summary
A high-performing co-educational grammar in Sidcup, Chislehurst and Sidcup Grammar School draws families across the Bexley area who are looking for academic rigour without single-sex schooling. With around 1,517 pupils against a stated capacity of 1,344, the school runs well above its intended size, a reflection of strong and sustained demand. Entry is at 11 through the Bexley Selection Test consortium, and competition for the 192 available places is considerable.
How hard is it to get in?
Highly competitive · 4 of 5 on the Passmate scale. Applications far outnumber the 192 Year 7 places each September, so exam performance matters more here than at most selective schools.
Where every mark matters.
Places are limited and demand is high, so exam performance is what sets candidates apart. Passmate turns the months ahead into ten focused minutes a day on the exact topics this school tests.
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Latest results
Attainment 8
75.6
National average 46.9
GCSE grade 5+ (English & Maths)
99%
National average 47%
Teaching & academics
Results here sit far above national benchmarks. The average Attainment 8 score of 75.6 is well over the national figure of 46.9, and 99% of pupils secure a grade 5 or above in English and Maths against a national average of 47%. With a pupil-to-teacher ratio of roughly 19, this is a setting where able, motivated children are stretched and expected to perform.
School life & ethos
- Boarding
- No
- SEN support
- 0.46%
- EHC plans
- 0.53%
- English as additional language
- 10.9%
- Free school meals
- 2.7%
Schools nearby
Bexley Grammar School
Welling, Greater London
Beths Grammar School
Bexley, Greater London
Wilmington Grammar School for Girls
Dartford, South East
Wilmington Grammar School for Boys
Dartford, South East
Dartford Grammar School for Girls
Dartford, South East
Dartford Grammar School
Dartford, South East
Watch Passmate decide how to teach.
Answer as a child would. Left: what they see. Right: what it learns about them.
A genuinely selective, oversubscribed grammar where strong results are the norm. Families confident in their child's exam readiness will find a school that delivers academically.
That’s where Passmate comes in. Tutoring is the most effective thing in a child’s preparation - a well-tutored child can outperform the vast majority of their peers. Passmate works alongside your tutor, not instead of them: it learns how your child thinks, finds the gaps, and shows the tutor exactly where to spend each session - so the limited time you have lands on what actually decides a place.
Works alongside your child’s tutor - not instead of them.
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Chislehurst and Sidcup Grammar School 11+: frequently asked questions
Passmate rating: benchmarked against every selective school in England using official admissions data. It measures demand for places, not school quality. Updated July 2026.
Compiled from public data. Last checked 5 June 2026.