Chattenden Primary School vs St Mary's Island Church of England (Aided) Primary School
A head-to-head comparison of two primary schools in South East, England, 1.4 km apart, using official English 2025 data. The better value in each row is highlighted.
Chattenden Primary School
Rochester · Academy primary · Ages 4–11
203 students
St Mary's Island Church of England (Aided) Primary School
Chatham · Local authority primary · Ages 3–11
663 students
| Measure | Chattenden Primary School Rochester, South East | St Mary's Island Church of England (Aided) Primary School Chatham, South East |
|---|---|---|
| Success Index (England) | 49 Lower 50% | 70 Top 25% |
| Region rank | #1413 of 2,471 | #713 of 2,471 |
| National rank | #8199 of 15,697 | #3874 of 15,697 |
| Sector | Academy | Local authority |
| Type | Primary | Primary |
| Year range | Ages 4–11 | Ages 3–11 |
| Students | 203 | 663 |
| Pupils on roll | 203 | 663 |
| Free school meals | 35% | 9.8% |
| Capacity filled | 96.7% | 105.2% |
| KS2 expected standard (RWM) | 69% | 71% |
| KS2 higher standard (RWM) | 6% | 10% |
| KS2 reading progress | – | – |
| KS2 writing progress | – | – |
| KS2 maths progress | – | – |
| Attainment 8 | – | – |
| Progress 8 | – | – |
| Grade 5+ English & maths | – | – |
| Grade 4+ English & maths | – | – |
| EBacc average points | – | – |
| A level points per entry | – | – |
| town | Rochester | Chatham |
| region | South East | South East |
| Website | www.chattenden.medway.sch.uk/ | www.st-marys-island-cofe-primary-school.co.uk |
The verdict
- •St Mary's Island Church of England (Aided) Primary School scores higher on the Success Index (England) (70.3 vs 49.1).
- •St Mary's Island Church of England (Aided) Primary School does better on ks2: reading, writing & maths expected standard (71% vs 69%).
- •St Mary's Island Church of England (Aided) Primary School does better on ks2: higher standard (10% vs 6%).
- •St Mary's Island Church of England (Aided) Primary School is the larger school with 663 students compared with 203.
- •Chattenden Primary School is a academy school while St Mary's Island Church of England (Aided) Primary School is a local authority school, so fees and admission rules differ.
The Success Index (England) summarises published results and context from official data. It does not measure teaching quality or fit. Methodology.
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Frequently asked questions
Is Chattenden Primary School better than St Mary's Island Church of England (Aided) Primary School?
On the Success Index (England), St Mary's Island Church of England (Aided) Primary School ranks higher (70.3 vs 49.1 out of 100). The index is built from published results and context data, not from teaching quality or fit, so visit both schools before deciding.
How far apart are Chattenden Primary School and St Mary's Island Church of England (Aided) Primary School?
About 1.4 km in a straight line, between Rochester and Chatham in South East.
Which has the better Pupils on roll?
Chattenden Primary School: 203. St Mary's Island Church of England (Aided) Primary School: 663. Number of pupils in the latest school census.
How do Chattenden Primary School and St Mary's Island Church of England (Aided) Primary School rank in South East?
Chattenden Primary School is 1413th of 2,471 and St Mary's Island Church of England (Aided) Primary School is 713th of 2,471 among primary schools in South East on the 2025 Success Index (England).