Highlighter from Highlighter on Vimeo.
Came across a post on Hack Education by Audrey Watters who explains the service Highlighter. The idea is that students (in groups for instance) can be invited to read, annotate and write in texts online and thus interact with the material provided by the teacher. It looks intriguing and I might give it a shot this semester.
Highlighter Groups from Highlighter on Vimeo.