Ermahayu, Dwi Indah, et al. “A Quasi‑Experimental Comparison of Problem‑Based Learning and Conventional Teaching Methods on the Mathematics Achievement of Tenth‑Grade High School Students”. Journal of Research in Vocational Education, vol. 8, no. 5, May 2026, pp. 6-9, doi:10.53469/jrve.2026.08(05).02.