Another key action is to respond to each message posted, always valuing the student's knowledge, even if you have to “extract milk from a stone ". Give recognition to students’ speech, creates a sense of security, making them more comfortable to express themselves. However, it is important to correct a mistake, but in a respectful manner and never directly. The trick is you answer in the reply message. Another way of encouraging dialogue is to put a content message and end with the following question: "what do you think of it?" The student feels that their view is important and that their contribution increases the debate.