The Effect of the Numbered Heads Together (NHT) Cooperative Learning Model and Puzzle Maker-Based TTS Media on Junior High School Students' Science Learning Outcomes

Abstract

This study aims to determine the effect of the numbered head together (NHT) cooperative learning model and puzzle maker-based TTS media on the science learning outcomes of eighth-grade students at SMP Negeri 17 Medan on the subject of elements, compounds, and mixtures. The study used a quasi-experimental design with a pretest-posttest control group design. The sample consisted of two classes, namely class VIII-1 (experimental class) with the NHT cooperative learning model and puzzle maker-based TTS media and class VIII-3 (control class) with a conventional learning model. Sampling was conducted using simple random sampling. The instrument used was a multiple-choice test. The data were analyzed by testing the hypothesis using a t-test. The pretest and posttest average scores in the experimental class were 37.90 and 82.10, respectively, and in the control class, they were 37.42 and 62.74, respectively. In testing the normality and homogeneity of the pretest and posttest data of both classes, it was found that the data of both classes were normally distributed and homogeneous. Based on the hypothesis testing, it was found that there was an effect of the cooperative learning model of the numbered head together (NHT) type and the TTS media based on puzzle maker on the science learning outcomes of eighth-grade students at SMP Negeri 17 Medan on the material of elements, compounds, and mixtures.