Highlights CBSE extended its last date to upload teachers’ data on the Online Affiliated Schools Information System (OASIS). The schools now have time to upload their teachers' data till April 16. New Delhi: The Central Board of Secondary Education (CBSE) has extended the last date to upload teachers’ data on the Online Affiliated Schools Information System (OASIS). The schools now have time to upload their teachers' data till April 16. CBSE informed schools about the low availability of teachers for the assessment of students who will appear in