The chapters in this book represent a cross-section of research conducted in inquiry-based science education at primary levels of schooling in international contexts that include school settings in Australia, India, Singapore, South Africa, Turkey, Northern Ireland, and the United States. The book includes empirical studies on the role of inquiry-based learning in advancing students’ conceptual understanding and modelling proficiency, students’ understandings about the nature of scientific inquiry, classroom studies on teachers’ enactment of inquiry-based learning, teachers’ facilitation of classroom discourse for inquiry-based learning, and co-teaching in developing teachers in adopting an inquiry-based pedagogy. It was originally published as a special issue of the journal Education 3–13.