Dr. Michalis Christodoulou has a position as an Assistant Professor and is currently working at the School of Primary Education, Aristotle University of Thessaloniki, Thessaloniki, Greece. He holds a bachelor’s degree in Sociology from the University of Crete, a bachelor’s degree in Philosophy from the University of Patras, and a Ph.D. in Sociology of Education from the University of Patras. He has worked for several years as a university teacher at the University of Patras, of Peloponnese, and at the Hellenic Open University where he delivered courses on the methodology of social sciences. He has been a member of various research teams that have carried out state-funded research works related to educational and social exclusion issues. His research interest and publications revolve around issues of quantitative and qualitative research design, the epistemology of social research, and qualitative data analysis.