On 1982 St:Mary's was began as an High School. This school was established by Rev.Fr.Joseph Alummoottil. During the period of Fr.Joseph Kurinjipparambil, this school joined with corporate management. Rev.Sr.Agness T.T was the first HM of the school. There were only 78 students and 3 teachers in the begining of the school. Now, there are 14 teachers including HM, 4 unteaching staffs and about 301 students in this school.