Moodleoverflow

A non-linear, non-chronological discussion forum. Similar to the forum activity, but focuses on straightforward question-and-answer discussions. Additionally, users rate posts and gain a rating score (“reputation”) by being rated by other users. Users who have started a discussion can mark an answer as helpful; and teachers can mark a post as a (correct) solution to the posed question.
Activity Module: Moodleoverflow
The Moodleoverflow activity provides users the ability to create discussion forums that are not strictly linear or chronological.
It has similarities to the Moodle _forum_, but it is more intended for question-and-answer style discussions and provides additional features that support meaningful interaction. Moodleoverflow features
are highly customizable to ensure that it fits the needs of all users. A Moodleoverflow instance represents a forum that contains multiple discussions with posts.
Installation
Clone the content into     {your/moodle/dirroot}/mod/moodleoverflow and complete the installation in
_Site administration > Notifications_ or run $ php admin/cli/upgrade.php in your cli.
Core features
The main features of Moodleoverflow are the  rating and reputation system ,  subscription and read tracking , the anonymous mode and  other forms of moderation .
Rating and reputation system
Like in _Stackoverflow_, users can rate posts with up- and downvotes, which rank the posts in a discussion. Additionally, the user that started the
discussion can mark posts as _”helpful”_(orange) and course teachers can mark a post as _”solution”_(green).
If enabled, Moodleoverflow tracks the users activity within a single course with a *reputation* score. Activities like voting or getting upvotes and helpful/solution marks
increase the reputation, while downvotes decrease it. A user’s reputation is displayed when they write a post. Detailed explanation as well as instructions on how
to tailor the reputation system to your own needs can be found  here.
What a typical discussion looks like:
Moodleoverflow offers the ability for teachers to show the user statistics for a single course. Teachers can then see which students are particularly active in Moodleoverflow forums:
Subscription and read tracking
Users can subscribe to individual discussions or entire forums to receive notifications via email. Teachers have the ability to enforce subscriptions for important forums.