The Effect of Classical Guidance Services Using the Jigsaw Cooperative Learning Model on Students’ Self-Regulation at SMA Negeri 8 Medan. Cakrawala Sekolah: Journal of Multidisciplinary School Education, [S. l.], v. 1, n. 2 May, p. 14–20, 2026. DOI: 10.66851/csjmse.v1i2.242. Disponível em: https://esp-journal.com/index.php/cakrawala-sekolah/article/view/242. Acesso em: 7 jul. 2026.