The author sincerely appreciates the recognition of National Association of School Psychologists (NASP) and his colleagues on being permitted to give the 2009 Legends in School Psychology address. He starts by acknowledging that his accomplishments are really the accomplishments of many. Throughout his career, the author has had the opportunity to work with highly talented colleagues and graduate students. They have supported and enriched the work. His mentors, T. Ernest Newland and John Salvia, deserve special recognition, as do his colleagues Sandra Christenson, Martha Thurlow, and Bob Algozzine. Many of his ideas came from them, though he stands solely responsible for the content of this paper. In this paper, the author provides an overview of the focus of his research and professional activity, talks about the context for the work, provides a set of generalizations based on research findings and experiences, and talks briefly about his view of the future of assessment, decision making, and public policy influenced by and resulting from it.