Sappaile, B. I., Hartinah, G., Hendrik, H., Anshoriyah, S., & 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), 76–86. https://doi.org/10.55299/ijere.v4i1.1268