The National Institute of Open Schooling has certain significant features in its evaluation system. One such feature is freedom to answer the questions in Public Examinations in any one of the scheduled regional languages, although the Question Papers supplied would generally be in English and Hindi/ available Regional mediums only. Intimation letters and Certificates have scanned photographs of the learners. The information about Examination Centres and result are made available on the NIOS website. NIOS has been doing innovations in the evaluation system to maintain its credibility and standards. The On Demand Examination System (ODES) at the Secondary and the Senior Secondary levels for the registered candidates is one such innovation.
The National Institute of Open Schooling (NIOS) has decided to conduct the On Demand Examination (ODE) from June 1, 2019. All the learners who could not pass the examination, or were eligible but could not appear in the Public Examination from CBSE or any recognised Board in India can pass the exam through On Demand Examination System of NIOS.