Sepriza, N. et al. 2025. THE EFFECT OF THE PROBLEM-BASED LEARNING MODEL INTEGRATED WITH ETHNOSCIENCE ON THE CRITICAL THINKING SKILLS OF 10TH GRADE STUDENTS AT SMAN 1 SENTAJO RAYA. Algebra : Jurnal Pendidikan, Sosial dan Sains. 5, 4 (Dec. 2025), 1247–1255. DOI:https://doi.org/10.58432/dj292n90.