Hi, I was reading about courses in this site. Maybe you tried it? Is there any colloquium, or you just have to communicate, interact, answer questions or ask?
Just to talk, there are chats.
To answer questions and help users, well you could do this anywhere on this site. Thus the site is meant for helping others.
Yep. What he said! :)
There's some chatboxes on the bottom of the page. Use that for general discussion... And here, on this part of the site, you can go to any subject (find more subjects on the top of the page) and there, you can discuss, answer, collaborate and ask questions... and win medals, therefore, improving your SmartScore... and thus you can get a certificate with your SmartScore that will credit your course; as far as I understand...
Each course has their respective page about it. :)
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