The school opened in September 1971 as the result of the amalgamation of two of Calgary's oldest independent schools: Strathcona School for Boys (founded in 1929) and Tweedsmuir: An Academic School for Girls (founded in 1959).
The school began operations in September 1971 following the consolidation of two of Calgary's most venerable independent educational establishments: Strathcona School for Boys (founded in 1929) and Tweedsmuir: An Academic School for Girls (founded in 1959).