The incident came to light in Nayagarh district last month when irate guardians of the victims petitioned the District Collector.
NHRC in its notice to the state government asked the school and mass education secretary to file a detailed report on the incident within four weeks.
Human Rights activist Prabir Das had moved NHRC and had urged it to direct the state government to pay Rs five lakh as damage to the affected students and to take stringent action against the head master.