The documents of the Church have repeatedly and categorically stated that parents constitute the first subject responsible for the upbringing of the children, but they should always be supported by school and other institutions. The school is not only an institution where knowledge is acquired, but it is also a community where people meet. Since parents are heavily involved in the dialogue between the teacher and the student, then it must be added that people should especially appreciate schools that offer a major support to parents in the sphere of the fulfillment of the responsibility of upbringing. In Christian education it is essential for a child to reach the height of humanity, thanks to the actions of parents, the school and the church. In the modern postmodernist culture, in the era of secularization and dismantling of the deposit of faith, in the period of consumerism, hedonism and easy lifestyle (living as if God did not exist) – it is not the description of reality that decides about the future, but the testimony of life and an authentic Christian identity of the master and the disciple. Hence continual training and self-education, and constant enrichment of their teaching methods and their personality are necessary for teachers, who by undertaking the service of teaching should fulfill both religious, moral and essential requirements. Teachers in a catholic school should bear in mind that that they are Christian teachers and that is why they should be the witnesses of the faith. Their identity is constituted at the same time by the mission given to them by the Church, by the necessary knowledge, mature personality and deepened spirituality. While talking about catholic school one must not forget that this school is supposed to form Catholics aware of their vocation and their place both in the Church and the modern world. Hence it is necessary to carefully select teachers who will work in catholic schools. These should be the teachers who are guided not only by their professional competence, educational and teaching skills, but also by their ethic virtues and practising the sacramental life.