For those who used to Twitter social network, Blackboard may seem confusing and inconvenient for communication.However, it has a lot of the same properties. You can create your post, and other people can reply and or quote it. In addition, your post are not limited in number of character as your Twitter post (140 characters). Blackboard also looks more organize. There are created topics by professor, under which students can comment and communicate with each other. 

On the other hand, Twitter forces the discussion very quickly, because of the limited length of the post . It allows you to create your own page, when Blackboard offer you to share the page with others. You can also follow different people and give like to the other's posts on
Twitter, while Blackboard is only for classmates.