THE EFFECTIVENESS AND IMPACT OF THE “LESSON STUDY” APPROACH ON THE DEVELOPMENT OF TEACHERS’ PROFESSIONAL COMPETENCIES AND SKILLS. Education in the 21st Century, [S. l.], v. 6, n. 2, p. 32–42, 2025. DOI: 10.46991/educ-21st-century.v6.i2.32. Disponível em: https://journals.ysu.am/index.php/Educ-21st-Century/article/view/12501. Acesso em: 22 jan. 2026.