Contributions to this book discuss various perspectives of teachers collaborating in design teams, by investigating the sense of collaboration and its effects, and the conditions that influence and drive it. The studies provided suggest that collaborative design and research supports participants (teachers and teacher educators) to improve their knowledge, specifically in regards to technological pedagogical content and subject matter. Participating teachers further developed curriculum design expertise, such as, understanding the relevance and effectiveness of involving stakeholders in designing and implementing newly designed curricula. This volume was originally published as a special issue of Educational Research and Evaluation.