Professor COŞTU, completed his undergraduate education in 1998 at Karadeniz Technical University in the Chemistry Education Department of Fatih Education Faculty. He completed his master's degree in 2002 in the Chemistry Education Program of the Institute of Science at Karadeniz Technical University, and in 2006, and PhD in the same department. From 1999 to 2009. He held positions as Research Assistant, Assistant Professor, and Associate Professor in the Chemistry Education Department at Fatih Education Faculty of Karadeniz Technical University. From 2009 to 2012, he worked as an Associate Professor in the Chemistry Education Department of Buca Education Faculty at Dokuz Eylül University, and from 2012 to 2014, he worked as an Associate Professor in the Science Education Department at Yıldız Technical University. Since 2014, he has been working as a Professor in the Science Education Department at Yıldız Technical University. His main areas of research include concept teaching, misconceptions, conceptual change, science history and philosophy. He has published around 200 papers in refereed journals and presented at conferences. Additionally, he has actively participated in numerous scientific research projects. Furthermore, he has authored and edited textbooks, served as chapter authors, and held editorial and board membership positions in many national and international journals. He is married and has three children.