If we revisit the Community of Inquiry Framework by Dewey, to review the key factors for the success of a learning community, we will see that it is all about presence.
But, which is the most important: social presence, cognitive presence, or teaching presence?
Besides the cognitive presence, I would say the teaching presence is one of the most important.
According to Garrison, 2009, it may be useful to discuss the influence of teaching presence on the success of an online learning experience. The body of evidence is growing rapidly, attesting to the importance of teaching presence for successful online learning. The consensus is that teaching presence is a significant determinate of student satisfaction, perceived learning, and sense of community.