There are massive open online courses and study material available for the students aiming at unlimited participation.

Some of the websites are listed here 

National Programme on Technology Enhanced Learning

 

http://nptel.ac.in/
TED www.ted.com

Khan Academy

www.khanacademy.org
Coursera www.coursera.org
National Institute of science communication and information resources nsdl.niscair.res.in/jspui/