How to teach swarming?

The other day I came across a post on someone's blog on group work, and I saw this funny (but true, at least to most of my experiences) graphic on group work. One of the soft skills required to graduate in the MEd program I teach in is to be able to demonstrate the ability to work with others on projects and joint efforts. This is quite broad as it doesn't specify whether someone is cooperating all the time, collaborating all the time, or choosing the situation and working accordingly. So, given my experiences working with others, in school, at work, and through extracurricular activities like Rhizo, I thought that it would be good to have a mix of individual activities and group activities in the course I just finished teaching. This seemed to have worked out well enough. As with any team project no one seems to come out of the activity without some minor bruising; working with others is a contact sport, at least as far as the ego is concerned†. So,...