<![CDATA[This study was motivated by the need to improve students’ learning outcomes in disc brake system material, which requires an integrated understanding of theoretical concepts and practical skills. The demonstration method provides students with concrete learning experiences through direct observation of components, working principles, and disc brake system inspection procedures. This study aimed to determine the improvement in learning outcomes among students taught using the demonstration method and conventional learning and to examine differences in learning outcome improvement between the two groups. A quantitative approach with a quasi-experimental method and a nonequivalent control group design was employed. The study involved 72 students in Grade XI of the Light Vehicle Engineering program at SMK Muhammadiyah Lemahabang in the 2025/2026 academic year, consisting of 36 students in the experimental class and 36 students in the control class. Data were collected through tests, observation, and documentation and analyzed using validity, reliability, normality, homogeneity, paired-sample t-test, independent-sample t-test, and N-Gain analysis. The results showed a significant improvement in the experimental class (p < 0.05), with an average N-Gain of 75.3266%, categorized as effective, compared with 37.9182% in the control class, categorized as less effective. The independent-sample t-test also indicated a significant difference between the two groups (p < 0.05). These findings demonstrate that the demonstration method is more effective than conventional learning in improving students’ learning outcomes in disc brake system material.]]>
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