NDRURU, Ester; SUSANTI, Nora; LUMBANTOBING, Jhonatan Ariski. Development and Effectiveness of a Canva-Based Problem-Based Learning E-Module Using the 4D Model to Improve Students’ Understanding of Molecular Shapes. Hydrogen: Jurnal Kependidikan Kimia, [S. l.], v. 14, n. 2, 2026. DOI: 10.33394/hjkk.v14i2.19963. Disponível em: https://ojspanel.undikma.ac.id/index.php/hydrogen/article/view/19963. Acesso em: 15 may. 2026.