ALISHER KUBAYEV. PROBLEM-BASED TEACHING IN HISTORY LESSONS - IMPLEMENTATION OF THE SYSTEM-ACTIVITY APPROACH. JOURNAL OF NEW CENTURY INNOVATIONS, [S. l.], v. 90, n. 1, p. 276–278, 2025. Disponível em: https://journalss.org/index.php/new/article/view/8675. Acesso em: 21 jan. 2026.