St.Theresa High School - SAS (ICSE) Arul Colony (Co-Education) is a Roman Catholic, Minority Institution established by the Society of the Sisters of St.Ann on 15th June 1992.The Society of St.Ann was founded by Fr.Wilhelm Meyer at Luzern in Switzerland.

The School Prepares the students for the Indian Certificate of Secondary Education Examination,through English Medium.

The students can opt for either Hindi or Telugu as their second language.

The second language starts from Class I to X.

Computer Science is a compulsary subject for all the students.