Great Lakes Secondary School

Public · Secondary

275 Wellington Street, Sarnia, ON, N7T1H1

+1 (519) 336-6131

Lambton Kent District School Board

Official website

Grades 9-121,095 studentsopen

School information

Grades served: 9-12
Enrollment: 1,095
School organization: Lambton Kent District School Board

Academic Performance

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

secondary

1.9 / 10

Grade 9 Mathematics: 31%
Grade 10 OSSLT, first attempt: 72%

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

1,095 students in 2024-2025 — up 6% since 2016-2017. Roll as reported by Ontario, not a projection.

16–171,029
17–18981
18–19900
19–20865
20–21700
21–22825
22–23960
23–24990
24–251,095

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.