Keystone School is a private co-ed school in the heart of downtown Toronto. Keystone provides small classes, a supportive, family-like environment with a project-based approach, preparing students to become well-rounded individuals. Keystone International School in Toronto is one of the best private high schools in Ontario, Canada for international students.

We see teaching and learning as a journey, where students are active participants who grow and develop both academically and socially. Students are actively engaged in their learning process through projects, events and activities that connect education with real life.

Keystone students are provided with learning opportunities that help them improve their 21st-century skills and ensure that they can thrive in a world where change is constant. Students become internationally-minded inquirers and thinkers, who ask questions and seek their own answers from both local and global perspectives. By nurturing students’ natural curiosity, we foster a love for learning.

Keystone at a Glance


Countries Represented


Average student per class


of the Grads receive University & College offers

A word from our students & parents…

“Keystone has been the best choice we made…”

I am a high school teacher and I know how important graduation is in everyone’s life. Thank you very much for everything you have done for Kledi and the appreciation you have for him. Once again thank you and I’m telling you once more that Keystone has been the best choice we made for Kledi. It was wonderful to hear everyone’s experiences. I wish good luck and success to all the students and wish you all the best in your work.

Ledi, Parent
“Perfect preparation for university!”

I joined this school with the intention of preparing for university. Keystone’s teachers are experienced, knowledgeable and caring. The contents and styles of teaching are perfect preparation for university.

Courtney, Alumni Class of 2019, University of Ottawa, Psychology/Linguistics
“…skills, we can use in our real lives!”

We are learning something really useful in our daily lives here. Teachers not only teach us something from the textbook but teach us more skills that we can use in our real lives. At Keystone, we have lovely teachers and interesting classmates. Everyone studies here, meets new friends here and has a lot of fun here. I absolutely fall in love with this school.

Ruby, Alumni Class of 2018, University of Toronto
“A spring board for students to unleash full potentials.”

Keystone International School is a friendly place which brings out the best in students: a spring board for students to unleash full potentials. My children love it here, great management staff and teachers.

Joyce, Parent

“At Keystone, I am not just another student.”

At Keystone, I am not just another student. Everyone cares about everyone here. The teachers follow your progress closely to make sure you are on the right path to meet your goals, and do not hesitate to take their own time to help you. I can always share my concerns, and am treated like an adult.

Martin, Alumni Class of 2018, York University, Biology
“Family-like environment!”

Our experience with Keystone International School has been extremely positive; what we like the most about this school is that it is a family-like environment.

Wael & Mona, Parents
“So many opportunities!”

There are so many opportunities for us to discover our interests and talents. We entered the COSTI’s Refugees & Human Rights Child & Youth Poetry Contest, and I played 1st in all of Canada. I’m happy to say with the help of Keystone, I am now studying in a program at a school that perfectly fits me.

Adham, Alumni Class of 2018, George Brown College, Construction Technology
“So easy to make friends with students from all over the world!”

Keystone helped me so much with my organizational skills and time-management. Structure of the classes at Keystone also prepared me for University. I loved the environment, it was so easy to make friends with students from all over the world.

Xhoi, Alumni Class of 2020, Humber College, International Business Co-op

“So easy to make friends with students from all over the world!”

The school has such a diverse environment which makes it’s so great. The teachers do an excellent job with my son and the rest of the students at school. I am pleased to say that during his first year he has made great progress in class and still is on his improvement path. The staff is always stay in touch with myself and other parents through emails keeping us up to date with school/calendar changes. I believe that with the support of parents together our school will be a great place for other students to learn and start their high school education. Thank you Keystone, I really appreciate all you do.

Sandra, Parent