The Effectiveness of the NHT (Numbered Heads Together) Cooperative Learning Model in Improving Students’ Learning Outcomes on Algebra Material

Abstract

Numbered Heads Together (NHT) is a type of cooperative learning model that emphasizes group collaboration by assigning numbers to each member, who are then responsible for answering questions in turn. The low learning achievement of students at SMP Negeri 1 Muaro Jambi is attributed to the dominance of lecture-based teaching methods and the lack of active student engagement, which leads to weak understanding of algebraic concepts. The NHT learning model is proposed as a solution by fostering active, collaborative, and student-centered learning environments. This study aims to evaluate the effectiveness of the Numbered Heads Together (NHT) cooperative learning model in improving students’ learning outcomes in algebra. The research employed a quasi-experimental method with a pretest-posttest control group design. The population consisted of all seventh-grade students at SMP Negeri 1 Muaro Jambi, with samples selected purposively from two classes, namely VII D and VII E. The results indicate a significant difference between students taught using the NHT model and those taught using conventional methods, with a significance value of 0.019 < 0.05, indicating that  is accepted. Furthermore, the improvement in learning outcomes based on the N-Gain score in the experimental class was categorized as moderate (0.628), which is higher than that of the control class categorized as low (0.29). These findings demonstrate that the NHT cooperative learning model is effective in improving students’ learning outcomes in algebra.