Anne Katz, PhD, has worked for 20 years as a researcher and evaluator for projects connected with the education of linguistically and culturally diverse students. She served as the coprincipal investigator for the national study focused on successful leadership in diverse school settings that provided the empirical base for this book. As a teacher educator, she has provided and supported professional development in the United States, Brazil, and Egypt. She was instrumental in developing standards for English as a second language through Teachers of English as a Second or Other Language. And she has assisted many school districts in developing more authentic assessments of student performance. In all her work, she has promoted the forging of links between research and the classroom to support meaningful school change.