Ranting, H.; Rumetor, J. J.; Liud, Y. H.; Rakim, R.; Kambong, H. J.; Nendissa, J. E.; Wohon, F. Implementation of Vygotsky’s Constructivism Theory Through the Project Based Learning Model of PAK Teachers Impacts Problem Solving of Grade XI Students at SMA Negeri 1 Kauditan. IJERE 2025, 4, 60-67.