Kirsi Tirri 1 and Elizabeth Campbell 2 and Liam Gearon 3 and Terence J. Lovat 4 1, Department of Teacher Education, University of Helsinki, 00014 Helsinki, Finland 2, Department of Curriculum, Teaching and Learning, Ontario Institute for Studies in Education, University of Toronto, Toronto, ON, M5S 1V6, Canada 3, Department of Education, University of Oxford, Oxford OX2 6PY, UK 4, Faculty of Education and Arts, The University of Newcastle, Callaghan, Newcastle, NSW 2308, AustraliaReceived 18 July 2012; Accepted 18 July 2012This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.Nowadays, schools all over the world are under pressure to create safe, orderly, and effective learning environments wherein students can acquire social as well as academic skills, which will allow them to succeed in school and beyond. Over the last two decades, student populations--as well as those of teachers--have become increasingly diverse. Students and teachers sharing the same school can come from a broad range of cultures and socioeconomic backgrounds. Schools face the challenge of creating pedagogical environments that are sensitive to numerous individual backgrounds in order to support students' social and academic success. In this kind of educational atmosphere, the moral core of teaching and the teacher's role as a moral educator are important issues in school pedagogy. Furthermore, updated research illustrates that pedagogy imbued with a moral core has ramifications for student well-being and achievement.The main focus of this special issue is on the moral core of teaching. It is an international forum for researchers to summarize the most recent developments and ideas in the field, with special emphasis given to the role that teachers should play in moral education. In this special issue, we have nine papers from three different countries, Finland, the Netherlands, and Iran. These three countries represent very different academic, religious, and sociological contexts for education. Finland is known to be Europe's highest achiever in international PISA tests in mathematics, science, and reading and was also the first Nordic country to establish the Ethical Code for Teachers in 1998. Six papers from Finland discuss the moral core of teaching in different contexts, including early education, elementary and secondary school, science education, and teacher education. Two papers from Iran deal with Iranian teachers' moral competence and discuss the moral nature of teaching in an Islamic country. …