The underhand volleyball serving skills of Year 7 pupils at SMPN 2 Kenduruan Tuban are still relatively poor, characterised by imprecise direction, suboptimal accuracy, and movement techniques that do not yet comply with the basic principles of serving. This situation highlights the need for a structured learning strategy. This study aims to determine the effectiveness of the drill method in improving pupils’ underhand volleyball serving skills. The study employed a quantitative method with a pre-experimental one-group pretest–posttest design. The study population comprised 101 students, with a sample of 33 Year 7 students selected via purposive sampling. The instrument used was the AAHPER Underhand Serve Test. Data analysis included descriptive statistics, the Shapiro–Wilk normality test, and the Paired Sample t-Test. The results showed that the mean pretest score was 9.33, increasing to 13.33 in the posttest. The data were normally distributed, with significance values of 0.265 for the pretest and 0.085 for the posttest (p > 0.05). The hypothesis test yielded a t-value of -26.533 with a significance level of 0.000 (p < 0.05). Thus, the drill learning method proved effective in improving the underhand serve skills of Year 7 students at SMPN 2 Kenduruan Tuban.
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