Hello, Murtala,
If I understand correctly what you are trying to do, you might want to consider simply using the social format for each of your courses:
Social format
This format is oriented around one main forum, the Social forum, which appears listed on the main page. It is useful for situations that are more freeform. They may not even be courses. For example, it could be used as a departmental notice board.- http://docs.moodle.org/en/Course_settings#Format
Why not take a look and see if that is what you are looking for?
Regards,
Art