In reading this article, my first reaction was overwhelming because my mind was going a mile a minute in trying to determine what's there, how it works and what missing pieces there are.
One aspect that we've talked about in this course happens to be the concept of independent, self directed learning which isn't mentioned a great deal in the article. It might apply more to the Adult learning environment than it does in basic, elementary I am all for collaboration and think that it's quite valuable in the sense that we often don't have that type of interaction in our everyday lives. Furthermore, Anderson's article focus on the learning triangle and his extension of the learning triangle provides great insight into the direction of creating a pedagogy of online learning however it's just as broad in depth and it is deep rooted in many if not too many concepts. It also leaves a great room for guessing though which is another reason for the feelings I have in identifying what's missing.
I found the following source that speaks to Self-Directed learning as it compares to Teacher directed and found that there's many elements of SOL that resonate with the online learning environment and could be included in Anderson's model where he speaks to the relationship between Teacher/Student as it relates to their relationship with the content.
Source: http://team6.metiri.wikispaces.net/file/view/Self-Directed+Learning+-+Malcom+Knowles.pdf