PUTRA, Hafidz Fiqih Kurnia; SARI, Rr. Lis Permana. Development of Chemistry Tetrahedron Mahaffy Based on Scratch Platform as Learning Media on Hydrocarbon Topics to Strengthen Systems Thinking Skills of High School Students. Hydrogen: Jurnal Kependidikan Kimia, [S. l.], v. 14, n. 4, 2026. DOI: 10.33394/hjkk.v14i4.21943. Disponível em: https://e-journal.undikma.ac.id/index.php/hydrogen/article/view/21943. Acesso em: 8 sep. 2026.