Open Learning Colleges In India: School of Open Learning (SOL) is a constituent of Delhi University. It is the largest distance education institute with around 10 lakh students. It was established under the Delhi University in 1962. It is a pioneer institution in the field of distance education in India. The school offers learning through the distance mode which is an alternative for students who need a flexible medium of instruction to attain higher education and skills. It maintains a well-stocked library for the development of the courses offered. It offers audio-video lectures.