Hypothes.is is an open source software project that aims to collect comments to statements that are accessible online in some kind of form. It filters and ranks these comments in order to evaluate the credibility of every statement. It could therefore be described as a kind of Peer Review level for the entire internet, which aims to stimulate open exchange throughout the web. With Hypothes.is you can have discussions, do social reading, organise research as well as personal memos. Collaborative annotating makes the reader more active, visible and social; furthermore, new possibilities for collaboration between students and lecturers are created.