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Sir Joseph Williamson's Mathematical School

Sir Joseph Williamson's Mathematical School is a selective grammar school for boys in Rochester, Medway, educating around 1,600 pupils aged 11 to 18. Entry to Year 7 is through the Medway Test, Medway Council's assessment (English, mathematics and reasoning), in which a minimum weighted score set each year decides who is assessed as suitable for grammar school.

RegionSouth East
AdmissionsSchool admissions page
DfE URN136662

The exam

Athena holds admission-route records for Sir Joseph Williamson's Mathematical School. They are shown by entry cycle below; where the provider changes between cycles, each cycle keeps its own recorded exam.

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Key dates & preparation

2028 entry

Test: Mid-September of Year 6, sat over two school days (September 2027)

Results: Early October 2027 — Medway Council publishes test outcomes

Offers: National Offer Day — Wednesday 1 March 2028

When to start preparing: Start preparing in the spring term of Year 5 (the standing rule: about 18 months before the test).

General guidance: this follows the rule of thumb of starting about 18 months before the test. It is not the school's own published advice.

Source: official admissions information · checked 2026-10-28

2027 entry

Test: Mid-September of Year 6, sat over two school days (September 2026)

Results: Early October 2026 — Medway Council publishes test outcomes

Offers: National Offer Day — Monday 1 March 2027

When to start preparing: Start preparing in the spring term of Year 5 (the standing rule: about 18 months before the test).

General guidance: this follows the rule of thumb of starting about 18 months before the test. It is not the school's own published advice.

Source: official admissions information · checked 2026-10-28

Admissions rules

No catchment — open competition

A child must reach the Medway Test’s minimum weighted score for the year. Schools then apply their own oversubscription criteria — statutory priorities first, then typically distance. There is no catchment priority.

Read the school's admissions policy

Admissions in numbers

Entry yearQualifying scoreNotes & source
2027Minimum total weighted score 478Medway Test (Medway Council): the minimum weighted score is set after marking so that roughly the top 25–26% of the Medway cohort is assessed as suitable for grammar school; the same standard applies at all six Medway grammar schools. Medway Council cohort figures: 3,962 children sat the test (2,113 of them Medway pupils) and 995 Medway pupils were assessed as eligible for grammar school. Source: official source · checked 2026-10-28
2026Minimum total weighted score 481Medway Test (Medway Council): the minimum weighted score is set after marking so that roughly the top 25–26% of the Medway cohort is assessed as suitable for grammar school; the same standard applies at all six Medway grammar schools. Medway Council cohort figures: 3,984 children sat the test (2,118 of them Medway pupils) and 956 Medway pupils were assessed as eligible for grammar school. Source: official source · checked 2026-10-28
2025Minimum total weighted score 482Medway Test (Medway Council): the minimum weighted score is set after marking so that roughly the top 25–26% of the Medway cohort is assessed as suitable for grammar school; the same standard applies at all six Medway grammar schools. Source: official source · checked 2026-10-28
2024Minimum total weighted score 492Medway Test (Medway Council): the minimum weighted score is set after marking so that roughly the top 25–26% of the Medway cohort is assessed as suitable for grammar school; the same standard applies at all six Medway grammar schools. Source: official source · checked 2026-10-28

Results & destinations

2025 results

GCSE: Attainment 8 score 69.5; 93.5% of pupils achieved grade 9-5 or above in English and maths GCSEs

DfE performance tables

A level: Average point score per A level entry 42.32 (average grade B+); 27.6% of A level students achieved AAB or higher

DfE performance tables

Source: official source · checked 2026-10-28

2024 results

GCSE: Attainment 8 score 70.3; 97.5% of pupils achieved grade 9-5 or above in English and maths GCSEs

DfE performance tables

A level: Average point score per A level entry 42.45 (average grade B+)

DfE performance tables

University destinations:

  • 3% of leavers — Oxford or Cambridge — School-published: 'Data Report 2024 — Year 13 Destinations: University 168 (78%); Oxbridge: 3%' (places).
  • 45% of leavers — Russell Group universities — School-published: 'Data Report 2024 — Year 13 Destinations: Russell Group / Sutton Trust*: 45%' (places). The school's own published category is 'Russell Group / Sutton Trust', recorded as published.

Source: official source · checked 2026-10-28 · official source · checked 2026-10-28

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