VAN LOGGERENBERG-HATTINGH, A. Examining learning achievement and experiences of science learners in a problem-based learning environment. South African Journal of Education, [S. l.], v. 23, n. 1, p. 52–57, 2006. DOI: 10.4314/saje.v23i1.24846. Disponível em: https://www.ajol.info/index.php/saje/article/view/24846. Acesso em: 13 oct. 2026.