I am thinking that it is not the same to be facilitating a class ( i.e., post secondary) where one expects students to participate in responding to white board, wikis, etc. than to facilitate a workshop for practitioners.
That's a very interesting question indeed! I've noticed the same and looked at some of the items in my research. The issues for me are interconnected with the question of how education is changing and the importance of creating a learning environment in virtual spaces that resonates with students.
Riddle, M., & Souter, K. (2012). Designing informal learning spaces using student perspectives. Journal of Learning Spaces, 1(2). Retrieved from http://libjournal.uncg.edu/jls/article/view/282/278
While talking about physical places, I feel the concepts apply to virtual spaces as well.
And this video called The Shift from Engaging Students to Empowering Learners.