STCS is one of the couple of high schools in Karnal with excellent standards of education provided by a Christian convent-run organization, The Sisters of the Little Flower of Bethany based in Mangalore.

St. Theresa's Convent School, Karnal was established in 1961 and is administrated by Bethany Educational Society, Mangalore, a Christian Religious Minority Institution.

Therese of the child Jesus' was born on 2 January 1873 at Alençon, in Normandy, a small town in northern France.

She died on 30 September 1897 having spent the last nine and half years of her life in a cloister convent at Lisieux in France.

The student cabinet is responsible for certain activities like helping teachers and other staff, before assembly monitoring of the classes and so on.

The students from this school after pursuing higher education have found employment in various Organisation and Institutions.