Leus, Olga, and Anatoly Maslak. “MEASUREMENT AND ANALYSIS OF TEACHERS’ PROFESSIONAL PERFORMANCE”. SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference 2 (May 25, 2018): 308–319. Accessed May 5, 2024. https://journals.ru.lv/index.php/SIE/article/view/3097.