<![CDATA[Learning in Light Vehicle Engine Maintenance (PMKR) has not been optimal due to the limited use of structured instructional media to guide students through standard operating procedures. This study aimed to determine the effect of jobsheet media on students' practical skills at SMK Negeri 2 Palembang. The research employed a quantitative approach with a posttest-only control group design. The sample comprised 60 students, divided into 30 students in the experimental group and 30 students in the control group, selected using purposive sampling. Data were collected through direct observation and practical performance tests (posttest), then analyzed using the non-parametric Mann–Whitney U Test. The results indicated that the average practical skill score in the experimental class was 89.36, which was significantly higher than that of the control class at 62.63 (p = 0.000; p < 0.05). Consequently, the implementation of jobsheet media had a significant and effective influence on improving students' vocational practical skills in the PMKR subject. ABSTRAK Pembelajaran Pemeliharaan Mesin Kendaraan Ringan (PMKR) masih belum optimal karena kurangnya penggunaan media instruksional yang membantu siswa memahami prosedur kerja secara terstruktur. Penelitian ini bertujuan untuk mengetahui pengaruh media jobsheet terhadap keterampilan praktik siswa di SMK Negeri 2 Palembang. Penelitian ini menggunakan pendekatan kuantitatif dengan desain eksperimen posttest-only control group design. Sampel penelitian berjumlah 60 siswa yang terdiri atas 30 siswa kelas eksperimen dan 30 siswa kelas kontrol yang dipilih melalui teknik purposive sampling. Data dikumpulkan melalui observasi dan tes kinerja praktik (posttest), kemudian dianalisis menggunakan uji nonparametrik Mann–Whitney U Test. Hasil penelitian menunjukkan bahwa rata-rata nilai keterampilan praktik kelas eksperimen sebesar 89,36, secara signifikan lebih tinggi dibandingkan kelas kontrol yang memperoleh rata-rata 62,63 (p = 0,000; p < 0,05). Dengan demikian, penerapan media jobsheet berpengaruh signifikan dan efektif dalam meningkatkan keterampilan praktik siswa pada mata pelajaran PMKR. ]]>
