Andrian, Dedek, and Leo Adhar Effendi. “Instrument and Evaluation of students’ Involvement in Learning Mathematics in 21-Century Skills at Senior High Schools of Riau Province”. Jurnal Penelitian dan Evaluasi Pendidikan 27, no. 1 (June 30, 2023): 14–25. Accessed May 4, 2025. https://journal.uny.ac.id/index.php/jpep/article/view/58176.