Sappaile, B. I., Hartinah, G., Hendrik, H., Anshoriyah, S. and Sumanik, E. D. (2025) “The Impact of Project-Based Learning on Students’ Collaboration Skills in Secondary Schools”, International Journal of Educational Research Excellence (IJERE), 4(1), pp. 76–86. doi: 10.55299/ijere.v4i1.1268.