Lestari, S.S. et al. 2025. The Effectiveness of the Project-Based Learning Model to Enhance High School Students’ Problem-Solving Skills in the City of Mataram, West Nusa Tenggara. Indonesian Journal of Educational Innovation. 1, 3 (Dec. 2025), 1–6. DOI:https://doi.org/10.65622/ijei.v1i3.153.