This book is a practical guide for pre-service, novice, and in-service teachers who wish to improve both their students successful learning and their teaching practice through materials development. It is the authors intention to encourage you to go on this journey by reading the content and doing all the suggested activities in each subsection prior to starting developing your materials. This way you will be able to gradually learn the knots and bolts of materials development and savour the rewards in terms of successful learning and teacher development. The book has been divided into four chapters. The first one focuses on the importance of materials development and deals with the concept, of materials development, the role of innovation in materials development, and materials development for teacher development. The second chapter discusses the role of motivation, affection and teachers beliefs in materials development. The third one provides the reader with a theoretical framework for materials development, particularly some practical hints to either create or adapt didactic material. The fourth chapter offers a set of sample units / workshops that the authors have designed for the English as a Foreign Language (EFL) classroom. The last section of the book deals with the conclusions.The book has been divided into four chapters. The first one focuses on the importance of materials development and deals with the concept, of materials development, the role of innovation in materials development, and materials development for teacher development. The second chapter discusses the role of motivation, affection and teachers beliefs in materials development. The third one provides the reader with a theoretical framework for materials development, particularly some practical hints to either create or adapt didactic material. The fourth chapter offers a set of sample units / workshops that the authors have designed for the English as a Foreign Language (EFL) classroom. The last section of the book deals with the conclusions.