Strathcona-Tweedsmuir is Southern Alberta's first full IB World School, and Alberta's only independent school authorized to deliver IB Programmes in Grades K through 12.

[1] The school participates in Canadian Educational Standards Institute program and is a member of Round Square and the Canadian Accredited Independent Schools (CAIS).

Strathcona was founded in 1929, and Tweedsmuir in 1959, with St. Hilda's School (1889–1949) preceding the latter.

[2] In 2003, seven students from the school were killed in an avalanche in British Columbia while on a skiing trip.

[3] The students were on a school ski trip on Mount Cheops near Revelstoke when the avalanche occurred.