Gerhard Schaefer, biology educator, is professor emeritus of the University of Hamburg. He was the chairman of the Commission for Biological Education (CBE) of the International Union of Biological Sciences (IUBS) for many years and has been the chair of the Educational Commission of the German Society for the Advancement of Science and Medicine (GDNÄ) since 1997. His main fields of research are concept-formation and attitude-development.
Ryoei Yoshioka is a senior researcher of the National Institute for Educational Policy Research (NIER) of Japan. His main fields of research are science education and database in education.