The process of taking the new knowledge, concepts and skills from laboratories to the land or field is called extension. Thus, extension forms an integral part of education. This book “Extension—Third Dimension of Education” emphasizes on this aspect. The book deals with various concepts, processes, strategies and the evaluation procedures to be follwed in extension education. Hence, the book would be of great help to those who are already concertrating on extension such as teachers and students of Agricultural Colleges/Universities, Krishi Vigyan Kendras, Home Science College/Universities/Departments/Faculties, Departemnt of Rural Development, Adult and Continuing Education and Colleges of education. For those who have not yet thought of the extension work as part of their programme, it could be of a guide. This book will also help those who are involved in fieldwork.