In recent years teachers have realized that change has become a permanent factor on the educational scene and therefore its operation or mechanism must not just be accepted, or even rejected, but above all understood. This book presents an approach towards some real understanding of educational changes and innovations. A number of mechanisms and processes are discussed and analysed in an attempt to present some sort of overview of the agents involved in change, an analysis of the major characteristics of resisters and innovators, an account of the traits and functions of innovative institutions and a description of three particular models which delineate the way in which change occurs. In the final section of the text attention is given to some contemporary educational innovations, and some suggestions provided for dealing with problems involved in their evaluation.