This book translates the best current research on adolescent writing instruction into teacher-friendly practices that are easy to implement in today's diverse classrooms. Leading experts present instructional methods that are applicable across the curriculum as well as specific, proven techniques to build writing skills and promote critical thinking in English language arts, social studies, science, and math. Key chapters address multimodal writing and pedagogical uses of generative artificial intelligence (AI). Other essential topics include self-regulated strategy development, culturally sustaining writing practices, writing for college readiness, and teaching argument writing. Guiding Questions, classroom examples, and Action Steps in each chapter enhance the book's utility as a teacher resource and course text.