Nababan, K.A., Salsabila, N.P., Khan, P.A.O., Pasaribu, H.M.A. and Saragih, L.S. 2026. Group Dynamics and Teamwork Effectiveness in the Intra-School Student Organization: A Case Study at SMK Negeri 7 Medan. International Journal of Science and Society. 8, 4 (Oct. 2026), 379-392. DOI:https://doi.org/10.54783/ijsoc.v8i4.1699.