Penggunaan Penggunaan Media Pembelajaran Berbasis PowerPoint untuk Meningkatkan Hasil Belajar Pengelasan SMAW: Utilization of PowerPoint-Based Learning Media to Improve SMAW Learning Outcomes

Ahmad Luqmanul Hakim (Universitas Negeri Semarang, Kota Semarang, Indonesia)
Lelu Dina Apristia (Universitas Negeri Semarang, Kota Semarang, Indonesia)
Kriswanto (Universitas Negeri Semarang, Kota Semarang, Indonesia)

Jurnal Pendidikan Teknik Mesin Undiksha
Vol. 15 No. 1 (2027)

This study analyzed changes in learning outcomes in Shielded Metal Arc Welding (SMAW) after students received instruction using Microsoft PowerPoint 2010-based learning media. A quantitative One-Group Pretest-Posttest design was employed involving 20 eleventh-grade students in the Welding Engineering program at SMK Walisongo, Semarang. Knowledge mastery was measured using 25 multiple-choice items with a maximum score of 25. The data were analyzed using descriptive statistics, the Shapiro-Wilk test, Paired Sample t-test, Cohen's dz, and N-Gain. The mean learning outcome increased from 16.95 (SD = 4.96) on the pre-test to 22.50 (SD = 2.46) on the post-test. The Paired Sample t-test yielded t(19) = 5.095 with p < 0.001. Since the significance value was lower than 0.05, H0 was rejected and Ha was accepted, indicating a significant difference between the mean pre-test and post-test scores. The mean difference was 5.55 points with a Cohen's dz of 1.14 which is in the large category, while the N-Gain of 0.689 was classified as moderate. These findings indicate that