Yeah, I've also been working on a startup in this space -Notable ( http://notable.ac http://notable.ac ) - It allows students to take their notes collaborativel

Yeah, I've also been working on a startup in this space -Notable ( http://notable.ac http://notable.ac ) - It allows students to take their notes collaboratively online, and everything is linked to the page in the course slides that it relates to. You can also ask questions on these documents and have them answered inline. Would be interested in people's thoughts on it.