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 (Jan. 2025), 76–86. DOI:https://doi.org/10.55299/ijere.v4i1.1268.