This looks like an interesting conference. Been looking into ways to bring education online through Hangouts . 
Google Education on Air
An education conference entirely online and completely free

. Conference schedule: conference sessions | eduonair
. Presenters: presenters 1 | eduonair
. Social media: social media | eduonair
. FAQs: faqs | eduonair
. Feedback: evaluation | eduonair

More: eduonair
Shared publicly