The article presents an analysis of the world's best practices of implementing Action Research (AR) in education in different countries of the world on the example of the USA, Japan, Great Britain, Finland, Australia, Russia, Kazakhstan, etc. The article reveals the history of the "Action Research" method, the contribution of scientists Kurt Lewin, John Dewey, John Collier, Stephen Corey, Lawrence Stenhouse, W. Carr, S. Kemmis, J. Whitehead, Walter R. Borg, etc. The specifics of the content and forms of implementation of the approach in different countries are shown. The possibilities of the development of research and creative activity of teachers based on the approach of research in action are considered. The advantages, potential opportunities, features, various approaches and methods of research in action are revealed.

       The authors also cite in this article the guiding principles of research activity, known as the unity of research and practice within the informal method of "Action Research", synergy of efforts through teamwork and cooperation, unity of research and practice, synergy of efforts through teamwork and cooperation. The role of reflection in the implementation of research in the activity is also shown. The possibility of practical application of the research (AR) to improve the effectiveness of the professional activity of the teacher, the educational activities of students, improving the quality of general education is substantiated.