The Central Board of Secondary Education (CBSE) is a national level board of education in India for public and private schools, controlled and managed by Union Government of India. CBSE has asked all schools affiliated to follow only NCERT curriculum. There are approximately 20,299 schools in India and 220 schools in 28 foreign countries affiliated to the CBSE. CBSE affiliates all Kendriya Vidyalayas, all Jawahar Navodaya Vidyalayas, private schools and most of the schools approved by central government of India.
For promotion from Secondary level (Class IX-X) to Senior Secondary level (Class XI-XII), a student must obtain, for all subjects (or best 5 if 6 subjects are taken), 33% overall. For class 12 students the promotion criteria is 33% overall, with 33% in both theory and practical examinations