This book offers a space for critically reflecting on participatory practices with the aim of asking and answering the question: How can we learn to better participate? To do so, it focuses on the emergence of new norms and forms of collaboration as participation, and on actual lessons learned from participatory practices. If collaboration is the interdependent formulation of problems and entails the common definition of a shared problem space, how can we best learn to collaborate across disciplinary borders and what exactly can be learned from such collaboration?