Shirky claims that all groups contain an implicit (and sometimes explicit) promise to all members that makes the desire for a form of collective action possible. The strength of the promise makes members willing to contribute. As teachers, we routinely conceptualize our classrooms as groups of students, but it's difficult to imagine what we offer them by way of a promise that Shirky might recognize. Most of the activities that occur in the classroom invalidate the premise of a group promise, since most of it involves students acting in isolation. I don't think it's unreasonable to assume that if pushed, many teachers might admit to the existence of such a promise between the teacher and the collection of students as individuals, specifically something along the lines of 'Do what I instruct, and you will pass this course'. Taken as a whole, this might be the kind of promise the school offers students individually, 'Follow our instructions and you will graduate'.
However, the kinds of classroom inquiry activities that my department has been advocating does allow for the kind of group promise Shirky discusses. In terms of science education, having students investigate elements in their school or community allows them to identify reasonable goals based on areas of interest ('we will measure the pH of the local pond' leading to a goal of 'we will help restore the pond ecosystem') lends itself to creating that kind of social consensus based not around individual rewards (top marks) but collective action (restoring the pond).
For Shirky, the tools in question are often types of social media, but even he recognizes that the group needs to find a tool that fits the needs of the group. Too often, teachers not only specify 'what is to be done' but also 'how it is to be done', robbing students of the chance to develop those crucial decision-making skills related to problem-solving and negotiating in a group dynamic. Plus, the how is often something to be done alone.
Finally, the bargain is the reward that the members of the group will get from the successful action as well as belonging to the group. Thus, rewarding a group of students with top marks is not an incentive to high-end students who might rationalize they could achieve a better performance individually, similarly some low-end students might realize that their past performance has been so poor that even superlative marks in the future will still not enable them to pass the course. The reward for cleaning up the pond might be a more interesting place for students to gather, they might earn the appreciation of the community and a sense of accomplishment, especially if an activity tied to the clean-up of the pond was how to make the pond more enjoyable with a minimal impact on the ecosystem.
I would hope that moving forward I will be able to keep those ideas of the promise, the tool, and the bargain in mind as I plan classroom activities.
It certainly seems more engaging than worksheets and readings.