Thornlea Secondary School is a secondary school in the Aileen-Willowbrook neighbourhood of Markham. Administered by the The York Region District School Board, the school has approximately 1045 students between 9 and 12. In the most recent year tests were administered, 2022 - 2023, the school scored an average of 97% in English and 78% in Math on their provincial standardized tests.
Scores (0-100%) assigned
by the Education Quality and Accountability Office (EQAO),
a Province of Ontario Agency, indicate number of students
at or above the provincial standard in that subject
for target year.