The present book addresses the following challenge: How do we create and sustain a teacher community? For practitioners, the main question in this handbook is: How do we build and facilitate teacher communities? The different chapters discuss teacher interaction for learning and professional development in light of three constructs: the group, the community, and the network. There is a wealth of literature, especially on theoretical frameworks, success factors, and barriers to participation in teacher communities. However, this book addresses the need for a step-by-step guide with valuable suggestions for those who want to create (from scratch) and support a community of teachers brought together to deal with specific issues and, importantly, mediated by educational technology