About some not fully clarified pages of the biography of K. D. Ushinsky (to the 200th anniversary of the birth of the great Russian teacher)

Introduction . The article was prepared in connection with the 200th anniversary of Konstantin Dmitrievich Ushinsky (1823-1870). Its purpose is to present in a complete form some little-known, not fully elucidated in science pages of his life. Materials and methods . The author used an axiological (value) methodological approach and a number of research methods in the process of work: biographical, work with literature, etc. Results . The article includes three sections. The first section summarizes various versions about the year of birth of the great Russian teacher. The second section is devoted to clarifying the question of the origin of his parents. The final section provides information about the ancestors and descendants of K. D. Ushinsky. Thus, each section is devoted to solving a specific scientific problem. Conclusion . In conclusion, it is concluded that further research work is necessary in order to create as complete a biography of K. D. Ushinsky as possible.