Thornlea SS@ThornleaSSYRDSB

Official account of Thornlea SS, a YRDSB secondary school. We offer FI, Pre-AP, ACAM, and SHSM. YRDSB Protocol: https://t.co/v4x6XhCkU7 thornlea.ss.yrdsb.ca Thornhill, ON Joined January 2017
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