Katriina Maaranen, PhD., is an Adjunct Professor of Education and a senior university lecturer of didactics in the Faculty of Educational Sciences at the University of Helsinki (ORCID: 0000-0003-3771-9759). Her teaching includes general didactics, qualitative research methods, and thesis supervision. Her research focuses are teacher education, reflection, personal practical theories, professional development, teachers’ professional work, and autonomy. She collaborates actively with researchers in Finland and internationally. She is the leader of the research group 21st Century Teacher as well as the Special Interest Group of Research on Teacher Education under the Finnish Educational Research Association (FERA). She also leads the Finnish teacher educators’ network (eTED) as well as is a council member in the International Forum for Teacher Educators’ Professional Development (Info-TED). She is currently involved in an Erasmus+ project Equity and Diversity in Teacher Educators’ Professional Development (ED-TED). The full list of her publications can be found https://researchportal.helsinki.fi/fi/persons/katriina-maaranen