When everyone tries to do all things, it dilutes the potential of doing things well.
Yet, on the other hand, if we differentiate too much we will never make the important connections and employ the interdisciplinary study that supports successful living and learning.
So, it is the right amount of both differentiation and collaboration that will lead to successful learning and teaching paths.
How does your model reflect a good balance of these two essential elements of teaching well. In what ways do you differentiate your roles so that you can dive in and teach with depth, and in what ways do you collaborate so that you can benefit from each other's perspectives, strengths, and experiences?
That is the key to good teaching and learning.