This book can be used by students and practitioners of extension, researchers and decision-makers. This is a collation of knowledge regarding the practice of extension and is not intended to be used as a recipe or blue print. Based on the context and the requirement, the approaches and tools should be selected, adapted and used. There is a built-in flexibility that would allow the user to employ his/her experience, creativity and imagination in adapting and using the approaches and tools described in this source book.