Congratulations to the Boys Basketball team for winning the OSBA Challenge Series! | Congratulations to 6 of our students for achieving top 25% in Canada, in the Canadian Mathematics Contest! | Summer Camp registrations are now open!

We are a K-12 private day and boarding school located in Markham, Ontario, Canada. With our unwavering dedication, care and support, we nurture our tomorrow’s thinkers to becoming responsible and compassionate global citizens.

300 students
capacity

1:15 teacher to student ratio

3 residence
halls

Orientation for new Winter students

J. Addison would like to welcome all new students that will be joining us this semester! We hope you have familiarized yourself with the school and enjoyed your first day 🙂 The J. Addison community is filled of opportunities and… more