A HISTORICAL EXCURSUS INTO THE DEVELOPMENT OF THE CLASSROOM SYSTEM OF EDUCATION IN THE SCHOOL NATURAL SCIENCE EDUCATION SECTOR OF UKRAINE IN 1959-2020. International Review for Human and Natural Sciences, [S. l.], v. 14, n. 3, p. 31–38, 2025. DOI: 10.59505/IRHNS.22352007.2024.3.03. Disponível em: https://www.irhns.com/index.php/irhns/article/view/62. Acesso em: 27 jul. 2026.