This text brings together cutting-edge researchers who study the transformation of practice through the enhancement and transformation of expertise.

Teams are commonly celebrated as efficient and humane ways of organizing work and learning. By means of a series of in-depth case studies of teams in the United States and Finland over a time span of more than ten years, this book shows that teams are not a universal and ahistorical form of collaboration. Teams are best understood in their specific activity contexts and embedded in historical development of work. The book develops a set of conceptual tools for analysis and design of transformations in collaborative work and learning.