Efektivitas Two Stay Two Stray terhadap hasil belajar kognitif Sejarah: Quasi-experiment pada siswa kelas XI

Abstract

This study investigated the effectiveness of the Two Stay Two Stray (TSTS) cooperative learning model in improving students’ cognitive learning outcomes in Indonesian History. The research was conducted with Grade XI social science students at MA Al-Ma’sum Malausma using a quantitative quasi-experimental design with a nonequivalent control group. The sample consisted of 69 students, comprising 33 students in the experimental group (XI IPS 2) and 36 students in the control group (XI IPS 1). Data were collected through pretests and posttests using 19 multiple-choice items and analyzed using tests of normality, homogeneity, an independent samples t-test, and effect size analysis. The results revealed a statistically significant improvement in the cognitive learning outcomes of students taught using the TSTS model. The experimental group’s mean posttest score (81.79) increased substantially from the pretest mean (53.12). Hypothesis testing showed a significance value of p < .003 (t = −3.058, df = 67), indicating a significant difference between the experimental and control groups. The effect size, calculated using Cohen’s d, was 0.74, representing a medium effect. These findings suggest that the Two Stay Two Stray cooperative learning model has a positive and meaningful impact on students’ cognitive achievement in Indonesian History.