Responsible, age-appropriate action is the result of successful inquiry. During the learning process action may extend the knowledge of a student or it may have a wider social impact. Action may involve service, as it can impact fellow students, or the larger community, both in and out of school. When students take action, they are learning to work cooperatively, think critically, problem-solve, engage in conflict resolution, and exercise commitment.
Action in the PYP does not need to be grandiose. It actually starts on a small scale, with the self, within the family, within the classroom and other areas around the school. Effective action is modeled by adults, student-driven and voluntary and grounded in personal experience.
International Baccalaureate Primary Years Programme. Making the PYP Happen: A Curriculum framework for international primary education, 2009. Pages 25-27.