Cribel is a fully operational social network and is very easy to use. Users can register into the website and subscribe to channels ruled by teachers or by people they designate so the order, content structure, method and quality is asured. Thus, subscribers to the different channels will only read selected quality content as a result of the academic rigour of the academic institution that governs the social network.
The figure below shows a user view of a typical channel (about the Python programming language in this case) the user is subscribed.
GitHub repo: https://github.com/ivosth/cribel