High Quality Content by WIKIPEDIA articles! Sacred Heart High School is a high school located in Yorkton, Saskatchewan, Canada.Sacred Heart High School was founded by the Sisters Servants of Mary Immaculate, and the school celebrated its 75th Anniversary in 1991. Sacred Heart High School has a long tradition of providing strong academic and spiritual education to its students. On January 11, 1917, the school opened, and was originally established as the Sacred Heart Institute, under the leadership of Sister Ambrosia Lenkewich, the Canadian Provincial Superior at the time.