To be effective, an online classroom must be a safe space where students feel their voices will be respected, supported and heard. Establishing clear guidelines for online interactions is a critical step in creating an online forum that will be successful long-term. A stronger in-class community will form as a result of establishing and maintaining a safe space in your online site.
[These 16 tips from Catlin Tucker will be a great help]
Full Text: Free Resources for Teachers | Online Student Communication.