This Festschrift honors the epic contribution of Kenneth G. Tobin to science education over his impressive career as a researcher, scholar, teacher, colleague, mentor, and leader. Each chapter highlights how Ken impacted on the discipline or classroom practice from the perspective of the contributor(s). Collectively, this volume provides a compendium of insights, transformations, methods and theoretical perspectives championed by Ken and his collaborators. In particular, the major trends led by Ken include, exemplary pedagogy, constructivism, interpretive research, sociocultural theory, microanalysis of classroom interactions, interaction ritual chains, emotions and emotional climate, authentic inquiry, and coteaching and cogenerative dialogues. Ken truly transformed science education research and classroom practice over his career.