From a preeminent literacy scholar, this book provides a research-based framework to guide teachers on how the sciences of reading and writing can be merged to strengthen instruction in both areas. Young-Suk Grace Kim explains the essential skills and mechanisms that underpin reading and writing and describes ways to leverage their interconnections to accelerate student learning. The book offers comprehensive coverage of both theory and research, identifying underlying principles and demonstrating how to translate this knowledge into effective classroom practices in grades K-12. Differentiated instruction is emphasized throughout, and applications for diverse learners--including bilingual students and those with learning difficulties--are given explicit attention. Chapter-opening Guiding Questions and Classroom Connections boxes throughout enhance the book's utility as a course text and professional development resource.