This book introduces the study and reform of curricular structures, an often-overlooked dimension of undergraduate student success. While student success is influenced by a complex array of factors, many of which lie beyond the control of universities, new research underscores that curricular structures (e.g., blocked courses, extended chains of required courses, pre- and corequisites) can be a significant barrier to success - one that unit-level faculty are uniquely positioned to address. By bringing together national research findings, change management experiments, and expert insights into the transformative potential of rethinking curricular structures, this volume opens an exciting new frontier in educational theory and practice, advancing the pursuit of equitable undergraduate success. Written in an accessible style for faculty, administrators, and higher education scholars, this book will resonate with leaders committed to building truly student-centered universities.