Global changes in all spheres of human life require medical education to form students' conscious attitude towards their own lives, mental and physical development, education, and further medical career. Practical classes are a type of teaching within a variety of teaching and learning approaches providing the close interaction and cooperation between the students and tutors and posing real-life tasks. It is at practical classes when the tutors or mentors can and should conduct a controlled evolving of concepts and development of skills. Making a collective decision and discussing clinical problems is one of the forms of interactive education that enables future doctors to learn how to express their thoughts correctly, how to clearly substantiate decisions. Unlike the traditional classes, this form gives the students an opportunity to check up themselves, to make decisions based on the main principles of the diagnosis and treatment of various nosological forms. The article presents an experience of fostering professional competencies in the 5th year students of the Faculty of Dentistry by applying a case study, an interactive teaching method (case-study method) during the course of paediatric therapeutic dentistry at the Department of Paediatric Dentistry, Ivano-Frankivsk National Medical University. This technique contributes to strengthening the generation of students’ knowledge and its shaping through independent activities and collective discussion; it also boosts students’ intellectual skills, creating and critical thinking. As for the tutors and mentors, this type of teaching form is an effective way to get feedback and contributes to the ability to effectively correct the ways to shape knowledge, and to organize consultancy assistance to students. The combination of interactive methods and other methods of knowledge, skills and competence building and the active independent work of students, the creation of the system and algorithm for implementing these methods, perfect mastery of their mentors and partnership, mutual respect between the teachers and students is a guarantee of the training of a highly competent specialist.