Starting his work as endowed Hendrik Pierson Professor for Christian Education at VU University Amsterdam in 1993 the author focused on the relationship of education, pedagogy, and religion. However, his attention was rather exclusively directed to Protestant schools. The argument was that in academia at that time, even in the faculties of education and theology at VU University Amsterdam as a Protestant denominational university, hardly any work was done in this field. After a couple of years the research focus broadened by giving special attention to the identity formation of children and young people in Protestant elementary as well as secondary schools. Gradually identity formation of pupils became the hard core concept and the aim of the research projects, while the identity of the school as well as the professional and personal identity of the teachers was interpreted in terms of hindering or fostering circumstances and actors regarding that aim. In this article, the author explores the impact of the school's supply in terms of the selected subject-matter and of the arrangement of pedagogical relations and situations by the professionals on the personal identity construction, the religious identity development of pupils.