CHALLENGES OF SAMPLING AND REPRESENTATION IN PISA STUDIES: IMPLICATIONS FOR STEM READINESS RESEARCH. Leadership, Education, Personality: An Interdisciplinary Journal, ISSN: 2524-6178, [S. l.], v. 18, n. 10, p. 846–853, 2025. DOI: 10.1366/tjvm2g42. Disponível em: https://sibe.rpress.co.in/index.php/jimr/article/view/840.. Acesso em: 21 feb. 2026.