The school is a full-fledged higher secondary school with two streams (general and vocational) in its higher secondary section. It has been working to impart education and professional training for the students to develop human resources. Admission to the secondary section is for boys only. However, the higher secondary section admits both boys and girls. With more than 1000 students, it is one of the biggest schools in India.
NNM High School showed a consistently high success rate in Secondary and Higher Secondary examinations, often reaching 100 percent. In 2006, the school set an all-time record in the history of higher secondary examination