SCHOOL PROFILE

Sir Joseph Williamson's Mathematical School

Secondary Academy converter URN 136662
Open
Pupils 8,834,192 Latest school census
Capacity 1,280 Published school capacity
Capacity used 121.5% Pupils as a share of capacity
Age range 11 – 18 Statutory age range
OFSTED

Latest graded inspection

21 March 2023
Latest published outcome Outstanding
OEIF
Quality of education Outstanding
Behaviour & attitudes Outstanding
Personal development Outstanding
Leadership & management Outstanding
SCHOOL DETAILS

About this school

School type Academy converter
Phase Secondary
Gender Boys
Religious character —
Local authority Medway
Trust LEIGH ACADEMIES TRUST
Census date 15 January 2026
PUPIL PROFILE

School community

Latest published pupil characteristics for 2025/26.

2025/26
Total pupils 1,555 1,555 full-time · 0 part-time
Female pupils 108 6.9% of pupils
Male pupils 1,447 93.1% of pupils

Free school meals

Pupils eligible for free school meals.

10.9%
13.9 pts below England
School 10.9%
Medway 25.5%
South East 19.0%
England 24.8%

English as an additional language

Pupils whose first language is not English.

13.2%
7.1 pts below England
School 13.2%
Medway 16.5%
South East 15.6%
England 20.3%

Young carers

Pupils recorded as young carers.

1.7%
0.7 pts above England
School 1.7%
Medway 1.0%
South East 1.7%
England 1.0%

Ethnicity

Largest recorded pupil groups.

White British
39.2%
610
African
21.7%
338
Indian
9.5%
148
Any other Mixed background
4.8%
75
Any other White background
4.8%
75
Bangladeshi
3.4%
53
Council, regional and national comparisons are pupil-weighted using published school census counts.
ADDITIONAL NEEDS

Special educational needs

Pupils receiving SEN support or with an education, health and care plan.

2025/26
Pupils with SEN 7.5% 116 of 1,555 pupils
13.4 pts below England England: 20.8%
School 7.5%
Medway 20.3%
South East 21.1%
England 20.8%
SEN support 6.8% 106 pupils
England 14.8% 8.0 pts below
EHC plans 0.6% 10 pupils
England 6.0% 5.4 pts below
PRIMARY NEEDS

Most common identified needs

Pupils
Autistic spectrum disorder 60
Other difficulty or disability 25
Social, emotional & mental health 11
Specific learning difficulty 10
Speech, language & communication 4
Physical disability 3

SEN comparisons are pupil-weighted using published 2025/26 Department for Education school-level data. Primary needs combine pupils receiving SEN support and pupils with EHC plans.

ACADEMIC PERFORMANCE

Key stage 4 outcomes

Published Department for Education results for 2024/25.

2024/25
ATTAINMENT 8

Average attainment score

69.5 30.3 pts above England
School 69.5
Medway 36.1
South East 38.5
England 39.2
English & maths grade 5+ 93.5% England 36.0% 57.5 pts above England
English & maths grade 4+ 97.2% England 51.4% 45.8 pts above England
EBacc entry 98.6% England 30.6% 68.0 pts above England
EBacc average point score 6.82 England 3.41
Progress 8 Not available for 2024/25

Latest published: 0.90 · 2023/24

Comparisons are averages of published school-level results for open schools. They are not pupil-weighted official local authority attainment rates.

ATTENDANCE & ABSENCE

Attendance profile

Published Department for Education absence data for 2024/25. Lower absence rates are generally better.

2024/25
ABSENCE RATE

Overall absence

3.65%

Percentage of possible sessions missed.

2.56 pts lower than England
School 3.65%
Medway 6.74%
South East 6.30%
England 6.22%
ABSENCE RATE

Persistent absence

4.97%

Pupils missing 10% or more of sessions.

10.85 pts lower than England
School 4.97%
Medway 18.21%
South East 15.75%
England 15.82%
ABSENCE RATE

Severe absence

0.37%

Pupils missing 50% or more of sessions.

1.44 pts lower than England
School 0.37%
Medway 2.36%
South East 1.93%
England 1.80%
Council, regional and national comparisons are averages of published school-level percentages rather than pupil-weighted official absence rates.
HOW DOES IT COMPARE?

School context

Comparison with open secondary schools.

CAPACITY

Capacity utilisation

121.5% 29.2 pts above England
Sir Joseph Williamson's Mathematical School
121.5%
Medway
97.6%
South East
95.0%
England
92.3%
Benchmarks use open schools in the same phase. Capacity utilisation is calculated from published pupil and capacity figures.
Sources: Department for Education · Get Information about Schools · Ofsted monthly management information