THE EFFECTIVENESS AND IMPACT OF THE “LESSON STUDY” APPROACH ON THE DEVELOPMENT OF TEACHERS’ PROFESSIONAL COMPETENCIES AND SKILLS. Educ-21st-Century [Internet]. 2025 Apr. 25 [cited 2026 Mar. 10];6(2):32-4. Available from: https://journals.ysu.am/Educ-21st-Century/article/view/12501