St.Mary's HSS was established in 1905 as a primary school. The school was upgraded as a High School in 1950 and a Higher Secondary School in 1998. The school is owned by the Corporate Manager Archdiocese of Changanacherry. St.Mary's HSS is located at Champakulam.The School is beside the holy river Pampa. The school campus is socketed in the pristine beauty of a typical Kerala village in Nedumudy Panchayat.