Twitter

Twitter, Blackboard and in-class discussions are some ways to have discussions, but the use of them are somewhat different. When using Twitter for a discussion, one usually have to be concise with his or her idea, and it is usually less formal as people is generally more expressive as he or she is behind the computers. While on 
Blackboard, because one knows that it is for a certain course, so there is definitely a more formality in the way one speaks his or her thoughts. An in-class discussion can sometimes be hard because some students may shy away from telling his or her opinions on the subject, but I believe that in-class discussions may be the best way to get across one's opinion and to have an immediate reaction from the students or the professor will enable an efficient discussion.