The definition of the role of school principal is currently undergoing transformation in light of modern school issues and a shortage of qualified candidates. In "A Century's Quest to Understand School Leadership," Kenneth Leithwood and Daniel Duke conclude that recent thinking has focused on six forms of leadership: instructional, transformational, moral, participative, managerial, and contingent. In "Leadership for Student Learning: Reinventing the Principalship," the Institute for Education Leadership tells why many individuals with administrative credentials choose not to pursue jobs and suggests some solutions. In "Leading Learning Communities: Standards for What Principals Should Know and Be Able To Do," the National Association of Elementary School Principals proposes six standards to provide a professional development agenda for practicing principals. In "Leadership in Education: Five Commonalities," Mark Goldberg distills five common traits from interviews with educational leaders. In "Trying to Stay Ahead of the Game: Superintendents and Principals Talk about School Leadership," Steve Farkas and others provide clues on how principals feel about their jobs. (RT)