There is great interest in educational leadership in the early part of the twenty-first century. This is because of the widespread belief that the quality of leadership makes a significant difference to school and student outcomes. In many parts of the world, including both developed and developing countries, there is increasing recognition that schools require effective leaders and managers if they are to provide the best possible education for their students and learners. More governments are realizing that their main assets are their people and that remaining, or becoming, competitive depends increasingly on the development of a highly skilled workforce. This requires trained and committed teachers but they, in turn, need the leadership of highly effective principals with the support of other senior and middle managers.