The Effectiveness of The Five-Column Model In Acquiring Chemical Concepts Among Second-Grade Middle School Students. Journal of the College of Basic Education, [S. l.], v. 30, n. 131, p. 185–202, 2025. DOI: 10.35950/cbej.v30i131.13340. Disponível em: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/13340.. Acesso em: 7 jul. 2025.