Tell me, please, which service to use for the following tasks:
There is a group of students who will share their notes, articles on some service (a La Habr). When this is configured the access to the blog, the ability to read, edit (can edit only authors, or "approved" users, if there are several authors). Downstairs as usual the comments to the article. Here are vykladyvaetsya lecture materials, assignments, and materials.
I was thinking about LJ. But I think there are more convenient services for this task. Server no. So I would like it to be some kind of online service (preferably free).
Anyone have any ideas?