Dr John M Denison Secondary School

Public · Secondary

135 Bristol Rd, Newmarket, ON, L3Y8J7

+1 (905) 836-0021

York Region District School Board

Official website

Grades 9-121,000 studentsopen

School information

Grades served: 9-12
Enrollment: 1,000
School organization: York Region District School Board

Academic Performance

Scores compare similar schools only within Ontario, never across Canada.

secondary

4.3 / 10

Grade 9 Mathematics: 47%
Grade 10 OSSLT, first attempt: 84%

How Ontario assesses schools

EQAO, run by Education Quality and Accountability Office.

Ontario publishes provincial assessment results for individual schools.

Grades tested: 3, 6, 9, 10
Subjects: Reading, Writing, Mathematics, Literacy
Most recent year: 2024-2025

Results for this school

Secondary

Results published

A school without a score is not a school with a low score. Scores are only ever compared within Ontario and within the same stage — never between provinces, which use different tests.

Education Quality and Accountability Office

Enrolment over time

1,000 students in 2024-2025 — down 3% since 2011-2012. Roll as reported by Ontario, not a projection.

11–121,032
12–13978
13–14945
14–15910
15–16886
16–17852
17–18843
18–19865
19–20880
20–21855
21–22880
22–23890
23–24995
24–251,000

Some years are published as rounded or banded counts.

Programmes

Programmes Ontario lists for this school in 2025-2026. Only programmes the province publishes a register for can appear here, so this is not a full list of everything the school offers — and an absent programme does not mean it is not taught.