E-Learning, competency, lathe, Google Classroom.This study aims to determine the effect of the use of E-learning on the competence of doing work using a lathe on students of Mechanical Engineering Education UNNES. The type of E-learning used is Google Classroom which is a product of Google for Education. In addition to knowing the effect on student learning outcomes, this study also aims to determine student responses to learning using Google Classroom. The research method used in this study is the experimental method. The design used in this study is the Randomized Control Group Pre-test-Post-test Design. The implementation of this research is in the Department of Mechanical Engineering UNNES with a population of Mechanical Engineering Education study program students who are currently taking the Machining Process course. The samples taken are group 1 and group 2 with the number of 20 participants each as an experimental class and class control. Retrieval of student learning outcomes data from each class is done by combining test results and project results. Data analysis in this study used the Independent t-test. The next step is to compare the average of the two groups' tests. The results of the study indicate that the use of google classroom can increase student knowledge on the material doing work with a lathe.

Tujuan penelitian ini adalah untuk mengetahui kontribusi dan peningkatan hasil belajar menggunakan peraga sistem pengisian. Metode penelitian menggunakan metode penelitian dan pengembangan (Research and Development) model ADDIE jenis quasi experimental design dengan model nonequivalent control group design. Teknik dan instrumen pengumpulan data menggunakan metode angket dan tes. Hasil uji kelayakan oleh ahli media memperoleh persentase sebesar 85,94% sedangkan ahli materi sebesar 89,22%, keduanya memperoleh kriteria sangat layak. Peningkatan nilai rata-rata pretest dan posttest sebesar 14,10% untuk kelas kontrol dan sebesar 25,93%. untuk kelas eksperimen. Hasil analisis uji-t diperoleh thitung sebesar-0,69 untuk pretest sedangkan hasil thitung untuk posttest sebesar 3,21. Hasil perhitungan uji n-gain memperoleh rata-rata n-gain sebesar 0,23 untuk kelas kontrol dengan kriteria peningkatan rendah dan 0,41 untuk kelas eksperimen dengan kriteria peningkatan sedang. Sumbangan relatif sebesar 41,70%. sedangkan sumbangan efektif 67,60%. Kata kunci : hasil belajar, pengembangan peraga, sistem pengisian.