Pengaruh Model Pembelajaran Kooperatif Tipe Student Teams Achievement Devisions (STAD) Terhadap Kemampuan Pemecahan Masalah Matematis Siswa pada Materi Relasi dan Fungsi di SMP Swasta Taman Siswa Pematangsiantar

Abstract

This study aims to determine the effect of the Student Teams Achievement Divisions (STAD) cooperative learning model on the mathematical problem-solving abilities of eighth-grade students in the Relations and Functions subject at Taman Siswa Pematangsiantar Private Junior High School in the 2025/2026 academic year. The research method used was a quantitative approach with regression analysis techniques. The results showed that the STAD learning model had a positive and significant effect on students' mathematical problem-solving abilities. This was demonstrated by the regression equation Ŷ = -36.516 + 2.291X with a regression coefficient value of 2.291. In addition, the coefficient of determination value of 89.3% indicates that the STAD learning model variable contributes strongly to improving students' mathematical problem-solving abilities. Thus, the application of the STAD cooperative learning model can be used as an alternative learning strategy to improve students' mathematical problem-solving abilities in relations and functions.