The St. Mary's Girls Higher Secondary school branched out as an exclusively Girls school in 1983 when the pattern was changed to Tamilnadu Higher Secondary syllabus from C.B.S.E syllabus. It was functioning in the Main School Campus and was then shifted to Maryland Campus by 1985. The school has reputation of the best girls Higher Secondary school in north Chennai.

Due to pressure from public we were constrained to open up co-education till std VIII. From 2001 onwards St. Mary's Girls' Matriculation Higher Secondary school is functioning in 37, Maduraswamy Madam Street, Perambur. The school has twin buildings with very good laboratories and spacious class rooms satisfying all conditions of stability and sanitary needs. We have a well planned pre K. G. class rooms with modern play items.
As an alumnus of reputed academic institution of Chennai we have been the recipients of several distinctions for our outstanding performance in academics & extra curricular activities.
It is our cherished goal and desire to impart education with better learning and good discipline upholding the rich traditions and values of our society by making a new India for tomorrow

Aim & Objective
The aim of the school is to provide a full liberal and comprehensive education and to impart education through modern training methods which will develop the character and personality of the child. The object is to turn out young men and women with a keen sense of discipline and responsibility, initiative and self-reliance, integrity and loyalty to the nation.