St. Luke's Senior Secondary School was founded in 1958. It is an English medium co-educational day school and is a Christian minority institution owned by Shimla-Chandigarh Educational Society. Sister Grace Maria, is the Principal of the School.

In the Senior Secondary Section the School offers three streams viz. Medical, Non-Medical and Commerce. The School offers wide range of co-curricular activities. While stressing the all round development of a student special emphasis is laid to see that true values are taught to students in keeping with the motto "JOY IN TRUTH". In a conducive atmosphere provided to them the students learn to appreciate various religions and the diversity of Indian Culture. In short we aim at producing a good human being.