This article discusses the state of scientific and methodological support of teachers, which is aimed at implementing the tasks of reforming basic secondary education on the basis of the Concept of «New Ukrainian School».
 The presented material is based on the results of the analysis of scientific, methodological and innovative activities of institutions of postgraduate pedagogical education, aimed at improving the system of quality assurance of education and professional growth of the teacher.
 Taking into account the changes in the content of education, the practical implementation of student-centered learning, the introduction of innovative pedagogical technologies into the educational process, it is indicated how the professional formation of a teacher in the system of postgraduate education is practically ensured. On the basis of the study, the authors determine the organizational and pedagogical conditions for improving the process of professional growth of teachers in the system of postgraduate pedagogical education, as a factor in increasing their competitiveness.
 The role of the system of postgraduate pedagogical education, as a system of adult education, in improving the process of professional growth of a teacher is disclosed. It is noted that the system of postgraduate pedagogical education, under the influence of socio-economic changes that take place in society, ensures the continuous professional development of teachers and their mastery of competencies that are closely related to the implementation of their professional pedagogical activities and the transition to a new quality of education.