Professor David Geelan is an Australian science educator with teaching experience in 4 states in Australia as well as in Canada and Papua New Guinea. He has contributed to teacher professional experience work in South Africa and research collaborations in Chile and Germany. He has served as President of the Australasian Science Education Research Association (ASERA) and is currently President of the Science Teachers Association of Queensland (STAQ).Professor Geelan has published 9 books, a number of chapters—including invited chapters in international handbooks such as the Second International Handbook of Science Education—and more than 200 peer-reviewed academic papers. He served as co-Editor in Chief of the journal Research In Science Education (RISE) and is an Editorial Board member for the Journal of Research in Science Teaching (JRST), Education Sciences, RISE and the International Journal for the Scholarship of Teaching and Learning (ijSOTL). Professor Geelan was appointed as a Carnegie Scholar at the Carnegie Academy for the Scholarship of Teaching and Learning (CASTL).Professor Geelan's research interests include chemistry and physics education, educational technology in science teaching, science teacher explanations, constructivism, narrative research and policy implementation.