Co-Ment, a libre web service for annotating, discussing and writing texts online. Co-Ment allows many to elaborate texts online. The editing environnementis wiki-like, supporting many syntaxes (Markdown, RST, HTML, and soonMediawiki), and it allows some finelly controlled layouts including table or images. But the most interesting thing is that users of Co-Ment can comment sharpextracts of the text, giving many point of views that allow the text to bebuilt on strong and equipped debates. Then, some advanced comment navigation features are provided, to discovernew annotations or go through the history of a debate, and it s evenpossible to set up an email alert on text edits or new comments. Co-Ment is fitted with many import/export format support : TXT, DOC, ODT,HTML It is available as a free web service, extended by pro accounts followingthe Wordpress model.Source code is available on the Co-Ment.org website, and it s also bundledas a Drupal module. To finish, some of the greatest use cases of Co-Ment are for education, inparticular first language and literature teaching in secondary education.So Sopinspace made some evolutions of the software for these use cases,setting up some stock configuration profiles for teachers and studentseasing some educational situation to take place : collaborative work, orteacher-student dialog