Thornhill, Ontario · Secondary · Grades 9-12
In the 2025 Fraser Institute Report Card (based on 2023-2024 EQAO data), Thornlea received an overall rating of 8.9 out of 10, ranking #23 out of 747 secondary schools in Ontario. This places it in the top 3% of all Ontario secondary schools.
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The school's trend is currently improving compared to previous years. Schools with an improving trend have demonstrated consistent gains in EQAO assessment results over the past five years.
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