Most of the growth in online learning is occurring in blended-learning environments, in which students learn online in an adult-supervised environment.

FORBES: To Out-Educate, We Must Out-Innovate

It was the ecosystem behind the iPads that mattered rather than the devices - and the iTunes U platform which allowed the school to put so many teaching resources online was much cheaper than the Virtual Learning Environments that many schools use.

BBC: iSchool - can tech really deliver education?