Canada, Toronto
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English language support is available for international students.
Keystone School is a private, co-ed international school located at 186 St. George Street in Toronto's Annex. It offers the Ontario Secondary School Diploma (OSSD) through the Flexible OSSD Homeschool Program, fully accredited by the Ontario Ministry of Education, enabling the OSSD to be earned from anywhere in the world. The program is asynchronous with about 110 hours of learning material across 3–5 units; final grades are 70% coursework and 30% final assessments. Grades 9–12 provide university preparation and a University Pathways framework, with academic guidance to support course selection and university applications. The school is pursuing International Baccalaureate Diploma Programme candidacy, with an IB Preparation and IBDP pathway announced for 2026–2027. Keystone emphasizes inquiry-based, project-based learning, small class sizes, and a campus near the University of Toronto, fostering global engagement, leadership, and service. Its campus offers field experiences and a vibrant array of clubs and committees for all students.