Trg, G.A.L.B. and Simanjorang, M.M. 2025. The Effect of the Project-Based Learning Model with a STEAM Approach on Students’ Learning Interest and Mathematics Learning Outcomes in Grade VII. Jurnal Pendidikan Matematika (JPM). 11, 2 (Dec. 2025), 238–247. DOI:https://doi.org/10.33474/jpm.v11i2.24335.