Thousand Islands Secondary School
2510 Parkedale Avenue West · Brockville · K6V3H1 · Upper Canada DSB
One of Brockville’s 4 secondary schools, counting 3 km beyond the edge: Thousand Islands Secondary School. Every school in and around Brockville →
What stands out about Thousand Islands Secondary School
- 640 students, near the middle of 810 for secondary schools in Ontario.
- Across its measures, its results average to the middle fifth in Ontario.
- Furthest behind on Grade 9 math: 46%, against 55% in Ontario.
- Over three years, 2 of its measures rose by 5 points or more.
- An English public school, run by Upper Canada DSB.
How Thousand Islands Secondary School does on Ontario’s tests
EQAO’s Grade 3, 6 and 9 assessments and the literacy test, 2024-25: each school against every school in Ontario.
With 2 of 2 measures reported, Thousand Islands Secondary School averages the middle fifth in Ontario.
| Measure | Here | Middle, Ontario | Band | 3-year change |
|---|---|---|---|---|
| Grade 9 math | 46% | 55% | Fourth fifth | +12 |
| Literacy test (OSSLT), first try | 89% | 85% | Second fifth | +6 |
N/R: EQAO doesn’t report groups too small to keep students anonymous. The three-year change is in percentage points, as the ministry publishes it.
A results band for Thousand Islands Secondary School, and no letter
Single schools aren’t lettered here; towns are. Thousand Islands Secondary School is placed instead by its results against the other schools in Ontario, which puts it in the middle fifth.
Brockville’s School Grade, on its Schools page, is where Thousand Islands Secondary School counts towards a letter.
Getting a place at Thousand Islands Secondary School
Registration happens with the board, not the school; the board names the school for the address.
The provinces’ education acts and the boards’ own admission policies; check with the board for a given address.
Side by side with the nearest secondary schools
Same-level schools nearby, nearest first, of every system.
Thousand Islands Secondary School is larger than any of its 5 nearest secondary schools.
| School | System | Language | Students | Band | Away |
|---|---|---|---|---|---|
| Thousand Islands Secondary School | English public | English | 640 | Middle fifth | |
| St Mary's High School | English Catholic | English | 385 | Middle fifth | 0.7 km |
| École secondaire catholique Ange-Gabriel | French Catholic | French | 80 | Top fifth | 1.5 km |
| Brockville Collegiate Institute | English public | English | 425 | Middle fifth | 1.9 km |
| Athens District High School | English public | English | 160 | Bottom fifth | 19 km |
| South Grenville District High School | English public | English | 370 | Bottom fifth | 19 km |
Secondary schools near Thousand Islands Secondary School
Nearest first, as the crow flies, up to 25 km. Each school’s own admission policy decides who gets a place.
Questions about Thousand Islands Secondary School
Who runs Thousand Islands Secondary School?
Upper Canada DSB: Thousand Islands Secondary School is one of its schools (English public).
What language does Thousand Islands Secondary School teach in?
English.
How do pupils get a place at Thousand Islands Secondary School?
Each board registers its own students; its website gives the school for an address.
Which schools of the same kind are near Thousand Islands Secondary School?
Closest by: St Mary's High School (0.7 km), École secondaire catholique Ange-Gabriel (1.5 km) and Brockville Collegiate Institute (1.9 km).
Sources: Ontario Ministry of Education, School Information Finder 2024–25 and school contact list (Open Government Licence – Ontario) · Ontario Ministry of Education, School Information Finder 2024–25 (EQAO results; N/R where groups are too small). Open Government Licence – Ontario. · map tiles © OpenStreetMap contributors. Under the Statistics Canada Open Licence.
Adapted from Statistics Canada (Census of Population 2021, population estimates 2025, 2021 census boundaries) under the Statistics Canada Open Licence; this does not constitute an endorsement by Statistics Canada. Neighbourhood names in some cities © OpenStreetMap contributors (ODbL).