In this article, the authors present one possibility for introducing artificial intelligence training, specifically Prolog logic programming, into the secondary school. The choice of Prolog logic programming as an appropriate artificial intelligence topic for secondary school study is motivated. The training is planned to take place within the school’s STEM centers. The introduction is carried out through the training of science, mathematics and informatics teachers for the subsequent training of students in the school’s STEM centers. The authors describe the structure and content of the curriculum created. The first results of the implementation of this program in teacher training are presented. One of the goals is to create a network of STEM centers offering training in artificial intelligence. The preferred form is project-based learning and multidisciplinary lessons. For the better organization of this training, a project called „Digital Bulgaria in Prolog“ has been proposed. The content of the project is demonstrated with a selected concrete example. Within this project, during the training courses, training resources are created that can be used by the participants of the network. Our experience shows that such organized training stimulates the teamwork of teachers from different specialties.