Analysis of online learning based edmodo in pandemic era in atomic structure classes x at senior high school harapan 1 Medan. Jurnal Pendidikan Kimia, [S. l.], v. 13, n. 3, p. 212–222, 2021. DOI: 10.24114/jpkim.v13i3.29104. Disponível em: https://jurnal.unimed.ac.id/2012/index.php/jpk/article/view/29104. Acesso em: 24 mar. 2026.