PENGEMBANGAN E-MODUL UNTUK MENINGKATKAN KOMPETENSI DASAR TEKNIK PEMESINAN DI SMK SEMEN GRESIK

Abstract

Bench-work instruction in the Machining Engineering program at SMK Semen Gresik has largely relied on one-way lectures and demonstrations, leaving students passive, less able to grasp basic techniques, and minimally aware of occupational health and safety (K3) procedures during practice. This study aimed to identify the obstacles in bench-work instruction and to develop and test the effectiveness of an e-module on students' learning outcomes in basic machining competencies. Product development used the ADDIE model (Analysis, Design, Development, Implementation, Evaluation), while its effect on learning outcomes was examined through a quasi-experimental Nonequivalent Control Group Design involving 20 tenth-grade Machining Engineering students, evenly divided into control and experimental groups. Expert validation of content, media, and language produced scores of 3.38 (84.44%), 3.62 (90.48%), and 3.53 (88.19%) respectively, all falling into the very valid and very feasible category. The trial showed that the control group averaged 86.11 with 80% mastery, while the experimental group averaged 89.30 with 100% mastery. The Independent Sample T-Test produced a t-value of 2.483, greater than the t-table value of 2.101, with a significance of 0.023 (p < 0.05), so H0 was rejected and Ha accepted. These findings demonstrate that the bench-work e-module significantly improved students' learning outcomes compared with conventional instruction, confirming that it is suitable to be recommended as a supplementary self-directed learning material in vocational schools, particularly to strengthen conceptual understanding and K3 compliance before students engage in hands-on workshop practice.