What will be the next big thing online? And how will it change our lives? In the Digital Giants series, the digital world's top thinkers share their visions of the future with the BBC.

Sam Pitroda, adviser to the PM of India delivers his views on cell phone voting and how the paradigm of the classroom will change in the future.

Digital Giants is part of SuperPower , a season of programmes on TV, radio and online exploring the extraordinary power of the internet.