St. Theresa Sr. Sec. School has classes from I to XII. The school prepares the pupils for all India Secondary School Examination (Class X) AISSE, and the All India Senior School certificate Examination (Class XII) AISSCE, conducted by the Central Board of Secondary Education, New Delhi.

Classes in Christian doctrine is compulsory for Christian students, and instruction in Moral and spiritual Education for all students is an integral part of the curriculum followed in the school. Besides Environmental Education, G.K., Art and Craft, SUPW, Health Education, Computer education (from classes III -X) are compulsory.

The important thing in science is not so much to obtain new facts as to discover new ways of thinking below them.