This study aimed to compare the speaking skills of students taught using the Round Robin learning model and those taught using the Direct Instruction model. This study employed a quasi-experimental method with a nonequivalent control group design. The participants were 63 fourth-grade students of SD Negeri Experiment, consisting of 32 students in the experimental class and 31 students in the control class. Data were collected through speaking skill tests administered before and after the treatment. The data were analyzed using descriptive statistics, the Shapiro-Wilk normality test, the Levene homogeneity test, the independent sample t-test, the Mann-Whitney test, and the N-Gain test. The findings revealed that there was no significant difference in students' initial speaking skills between the experimental and control groups (Sig. = 0.699 > 0.05). However, the posttest results showed a significant difference between the two groups (Sig. = 0.003 < 0.05). The experimental class obtained an average N-Gain score of 0.39 (moderate category), whereas the control class obtained an average N-Gain score of 0.19 (low category). Furthermore, the Mann-Whitney test on N-Gain scores indicated a significant difference in improvement between the two groups (Sig. < 0.001). These findings suggest that the Round Robin learning model is more effective than the Direct Instruction model in improving the speaking skills of fourth-grade elementary school students.
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