This volume stimulates critical discussions of the different variants of implementation, translation and scaling research approaches. It presents an integrated collection of different implementation and scaling studies that analyse the different facets of co-design, learning design, curriculum development, technology development, professional development and programme implementation. It also provides critical reflections on their impact and efficacies on transforming practices, informing policy-making, and theory derivation and improvement. The chapters in this volume will provide readers a deeper understanding of scaling of educational innovations in diverse socio-cultural contexts.