High Quality Content by WIKIPEDIA articles! Sainik School Amaravathinagar is one among the 20 Sainik Schools in India, located in Tamil Nadu. It is an English medium, residential school for boys providing public school education with a military bias up to 10+2 stage as per the Central Board of Secondary Education. Sainik School, Amaravathi was started in 1962 as part of the Sainik School system. It was called Sainik School, Madras (SSM) until 1975. Sainik School, Amaravathinagar, was formed with the objective of training cadets to join the National Defence Academy - NDA (NDA provides combined training for the cadets entering into all the three forces in India).