About Us

Keystone International Schools: Empowering Global Citizens Through Education

Founded in Istanbul in 2011, Keystone International Schools expanded by adding a Toronto campus in 2018, further enhancing our commitment to providing memorable, joyful learning experiences. We adhere to the Canadian education system, offering our students the chance to earn an official Prince Edward Island diploma, which is globally recognized and assures a quality education on par with that in Canada. This commitment has resulted in a 100% university acceptance rate for our students worldwide.

Keystone holds accreditation from the Western Association of Schools and Colleges (WASC), reinforcing our dedication to high educational standards through annual evaluations. As a member of ROUND SQUARE, Keystone fosters connections with peers worldwide, enhancing holistic development and global citizenship. Our goal is to empower students to be proactive, thoughtful global citizens, poised to make positive contributions to an interconnected world.

Nurturing Minds, Inspiring Futures: The Journey of Sema Kizilkaya and Keystone International Schools


In May 2024, when Canadian inspectors visited our school, we had a lovely memorial photo shoot with Anna Hall.

Sema Kizilkaya’s life is dedicated to education and shaping future generations. Born in Istanbul, she earned a Marketing Degree from Yeditepe University and an Early Childhood Education Diploma from Vienna.

In 1991, she founded a preschool named after her daughter, Doğa, leading it for 16 years. She then moved to Ottawa to work as an assistant teacher at the Carleton District School Board.

Sema later established Keystone International School (K-12) for expatriate families and Kilittasi School Dual Program (K-8) for Turkish nationals, where she serves as CEO, upholding high education standards.

Sema is also an accomplished author, publishing children’s books like “Hand in Hand,” “Good Morning Tale,” and “Omer’s in Oslo.” She divides her time between Toronto and Istanbul, contributing significantly to international education.


Welcoming the World: Our Diverse Student and Teacher Body for 2023 -24

Every year, the distribution of our students’ countries of origin changes due to global events. We take great pride in our diversity and warmly welcome students and teachers from around the world.