Ramakrishna Mission School, Narottam Nagar, began with 25 girls and 83 boys. The girls were shifted to Khonsa when the Ramakrishna Sarada Mission School came up in 1975. At that time the literacy rate of Arunachal Pradesh was 11.27% (1971 census).
The foundation stone of the present Ramakrishna Mission school building was laid by Shri V. V. Giri, the President of India, on 21 April 1974. It was later inaugurated by Shri Morarji Desai, the Prime Minister of India, on 4 November 1978.
The Higher Secondary School was inaugurated on 30 March 1986 by Srimat Swami Gambhiranandaji Maharaj, the 11th president of Ramakrishna Math & Mission. In course of time new buildings came up as work expanded.
This is a fully a residential school, preparing boys for the All India Secondary Examination and Senior Secondary School Examination of the Central Board of Secondary Education, New Delhi. The medium of instruction is English. Hindi too is taught right from Class – Prep. Sanskrit is the third language. The School has an experienced and qualified staff, and it is supervised by monks of the Ramakrishna order.