DDDM (Data-driven decision making) and problem-solving within classrooms and schools is integral to action research in order to meet the instructional, behavioral, and social emotional needs of students with diverse learning needs; however, many new educators struggle to understand the link between DDDM and action research. This book extends educators’ knowledge and skills to collect, analyze, and utilize data to effectively plan, teach, progress monitor, and provide interventions for students within a comprehensive system. This user-friendly book will serve as both a reference and practical resource guide. Each chapter connects research to practice and extends learning through case studies, vignettes, samples, practical strategies, real-world context, links to resources, and end of chapter discussion questions. Written for both general and special educators, this comprehensive yet accessible resource will help to demystify action research by outlining how DDDM, action research, and special education processes, including MTSS, work in tandem to improve outcomes for students with diverse learning needs.