The analysis of social trends in the field of education shows an increase in the requirements for the teacher’s professional competence and personal qualities. The purpose of the article is to determine in experimental conditions the content of the methodical service of the educational institution to solve problems and increase the effectiveness of its work. The article reveals the content of the organization of the system of continuous professional and pedagogical education in a particular general educational institution in the conditions of experiment. Based on the activities in the process of research and experimental work, the institution has developed the Concept of social-pedagogical projecting of the developmental and educational process of the secondary school. The systematic work is planned to increase the level of professional competence of pedagogical staff of educational institutions: optimization of self-education processes, diversification of forms of scientific and methodological work, intensification of processes of continuous professional training. That is why the system of internal methodical work is one of the school priorities, the main task of which is the systematic collective and individual activities of teachers aimed at improving their scientific-theoretical, general cultural level, psychological and pedagogical training and professional skills. During the research the main emphasis was placed on the problem-target, as well as system-structural methods of processing and analysis of scientific achievements, generalization and comparison, as well as on the diagnostic method. Important semantic transformations in the education system require solving the problem of the quality of growth of professional competence of a pedagogical worker who is aware of the importance of social responsibility; is able to formulate and practically implement new pedagogical goals; is a holistic, pivotal figure in the development of students’ life competence. Prospects of the educational institution, its purpose and objectives of educational work are determined using comprehensive psychological and pedagogical diagnostics, professional tools, which further allows to identify problems and potential opportunities of all participants in the educational process, gaps or, conversely, creative, professional and personal potential.