NIOS offers a wide range of subjects in comparison to any other formal schools. The learners are free to choose subject combinations as per their needs and goals. The learner’s study at their own pace from specially designed materials and have the freedom to appear in examinations as per their preparation. There is a provision of credit accumulation. The registration of the learners is valid for a period of 5 years. The Secondary/ Sr. Secondary certificates obtained from NIOS have the same recognition as certificates issued by other boards.