The St. Mary's Singers and Treblemakers showcase their beautiful harmonies at many events all year. SMCSS music courses focus on vocal, instrumental and theatre production. Starting in grade 9 students have an opportunity to begin to develop their musical literacy and performance skills in the classroom. Throughout the term students expand their understanding of musical conventions, practices and terminology in the classroom. Every other year grade 11 and 12 students can take the Instrumental - Music Theatre course and become members of the SMCSS pit band for that years dramatic production. This course allows students to continue to develop their understanding of the elements of music as well as their technical abilities.