97%
GCSE 9–4 · 2024/25
94%
GCSE 5+ · 2024/25
69.5
Attainment 8 · 2024/25
99%
EBacc entry · 2024/25
1473.6
EBacc APS · 2024/25
1,528
Pupils · 2024/25
14%
EAL · 2024/25
5%
Persistent abs. · 2024/25
Ofsted inspection
Outstanding
Ofsted inspection · 21/03/2023
Inadequate
Requires improvement
Good
Outstanding
Local authorityMedway
PhaseSecondary with sixth form with sixth form
School typeAcademy
Pupil : teacher ratio22.3:1
AdmissionsSelective
Religious characterNone
StatusOpen
Overview of Sir Joseph Williamson's Mathematical School · Secondary with sixth form · Medway
Part ofLEIGH ACADEMIES TRUST
How does this school perform?
Key Stage 4 · 2024/25 · trend since 2016/17
GCSE 9–4 incl. Eng & maths
97%
-2pp
100%99%97%
'19'22'23'24'25
'25 · 97%
GCSE 5+ incl. Eng & maths
94%
-4pp
98%96%94%
'19'22'23'24'25
'25 · 94%
Attainment 8
69.5
-0.8
70.668.566.5
'19'22'23'24'25
'25 · 69.5
EBacc entry
99%
+2pp
99%90%80%
'19'22'23'24'25
'25 · 99%
EBacc APS
1473.6
+65.5
1494.01342.51191.0
'19'22'23'24'25
'25 · 1473.6
Sixth form
Key Stage 5 · 2024/25 · trend since 2016/17
A-level APS
42.3
-0.1
45.542.840.1
'19'22'23'24'25
'25 · 42.3
A-level value added
+0.20
-0.1
+0.3+0.20.0
'17'18'19'24'25
'25 · +0.2
AAB+ in facilitating subjects
28%
+1pp
41%33%24%
'19'22'23'24'25
'25 · 28%
Average A-level grade
B+
0
AA-B
'19'22'23'24'25
'25 · B+
Pupils & context
2024/25
Pupils on roll
1,528
Pupil : teacher ratio
22.3
Workforce data · 2025/26
EAL
14%
FSM eligible
11%
SEN
7%
Overall absence
4%
Persistent absence
5%
Contact
Address
Maidstone Road, Rochester, ME1 3EL
Local authority
Medway
Website
Telephone
Email
—
History
All years · Historical DfE data by academic year
Secondary — Key Stage 4
GCSE attainment and Progress 8 — how pupils progressed from KS2 to KS4.
| Year | GCSE 9–4 | GCSE 5+ | Attainment 8 | Progress 8 | EBacc entry | EBacc APS | EBacc lang entry | Cohort |
|---|---|---|---|---|---|---|---|---|
| 2024/25 | 97% | 94% | 69.5 | Not applicable | 99% | 1473.6 | 99% | 1,528 |
| 2023/24 | 100% | 98% | 70.3 | +0.90 | 97% | 1408.1 | 98% | 1,507 |
| 2022/23 | 100% | 98% | 70.4 | +0.85 | 99% | 1398.4 | 99% | 1,479 |
| 2021/22 | 99% | 96% | 70.6 | +0.91 | 99% | 1494.0 | 99% | 1,464 |
| 2018/19 | 100% | 94% | 66.5 | +0.53 | 80% | 1191.0 | 81% | 1,359 |
| 2017/18 | 99% | 90% | 65.6 | +0.49 | 71% | 1021.9 | 74% | 1,294 |
| 2016/17 | 98% | 94% | 70.1 | +0.86 | 88% | — | 93% | 1,256 |
Sixth form — Key Stage 5
| Year | A-level APS | Avg grade | VA progress | AAB+ | Cohort |
|---|---|---|---|---|---|
| 2024/25 | 42.3 | B+ | +0.20 | 28% | 221 |
| 2023/24 | 42.5 | B+ | +0.34 | 27% | 220 |
| 2022/23 | 40.9 | B | — | 25% | 210 |
| 2021/22 | 45.5 | A- | — | 41% | 201 |
| 2018/19 | 40.1 | B | +0.01 | 24% | 196 |
| 2017/18 | 39.1 | B | +0.06 | 23% | 179 |
| 2016/17 | 39.2 | B | +0.06 | 27% | 184 |
Pupils & absence
| Year | Pupils | Pupil:teacher | SEN | EAL | FSM ever | Absence | Persistent absence |
|---|---|---|---|---|---|---|---|
| 2024/25 | 1,528 | 21.1 | 7% | 14% | 11% | 4% | 5% |
| 2023/24 | 1,507 | 20.4 | 10% | 15% | 10% | 4% | 9% |
| 2022/23 | 1,479 | 20.8 | 8% | 16% | 10% | 5% | 9% |
| 2021/22 | 1,464 | 19.8 | 8% | 15% | 10% | 6% | 14% |
| 2020/21 | 1,430 | 20.5 | 8% | 14% | 8% | — | — |
| 2018/19 | 1,359 | 18.9 | 7% | 14% | 9% | 4% | 5% |
| 2017/18 | 1,294 | 19.7 | 6% | 13% | 8% | 4% | 5% |
| 2016/17 | 1,256 | 18.9 | 6% | 12% | 8% | 4% | 4% |
School performance data © Crown copyright. Source: Department for Education.