The main goal of this paper is to present ‘SADDIE’, the methodology for designing educational games that was developed at the Faculty of Education, University of Ljubljana and defines indikative phases for serious game design project that is implemented as a two‐semester project in the course "Application of ICT in education". The methodology is carefully designed and its application has various positive outcomes. Serious game as a final product is just a side effect of the more important goal, i.e. achieving competences that are crucial for teachers. Such competences include the ability to determine learning objectives that are consistent with the curriculum, the selection of appropriate teaching approaches and their implementation in the learning process, preparation of feedback for students, evaluation of acquired knowledge and evaluation of the learning process.