Book excerpt: This book offers educators new understandings of 21st century diversity emerging from contemporary national events within the U.S., global movements, and changes in the world political order that have long-lasting impact on local education and call for rethinking traditional generalizations and empirical prescriptions for inclusivity in teaching and learning. The book expands the literature on teacher preparation and intercultural education by providing the educational community with critical perspectives, theoretical approaches, and research methodologies for educational inquiry responsive to diversity. Driven by changes in classroom diversity this book offers educators, researchers and policy makers a language for articulating complex differences in educational reform, policy and practice.