On the first day of school, Mr. Donegan tells his students that they will have a weekly class meeting wherein they will discuss many topics related to their classroom and their experiences for the year. In their first meeting, they will draft the classroom rules and procedures as a group. Future meetings will include discussions on changes to the rules, curriculum decisions and even conflict resolution. By incorporating weekly class meetings into his instructional plans, Mr. Donegan is most likely drawing from which of the following educational theories?