The Effect of Job-Related English Learning Materials for Mobile Learning Implementation on Students’ English Mastery

This study aims to test the effectiveness of the Job-Related English Learning Material (JRELM) for Mobile Learning Implementation for teaching English at Bali State Polytechnic, Indonesia. Regarding English language aspects and skills, JRELM includes grammar, vocabulary, reading, speaking, listening, and writing materials. This study was conducted by following the pre-test and post-test control group design. This study involved 48 students; 24 were in the experimental group, and the other 24 were in the control group. They were the 2nd-semester students of the electrical engineering study program at the Bali State Polytechnic. To collect the study data, the researchers used pre-test and post-tests to measure the students’ English mastery. Validity and reliability tests were conducted to ensure the pre-test and post-test were valid and reliable before being used to collect the study data. The researchers used the results of the pre-test and post-test of the experimental group and control group to get the N-gain scores. Then, the N-gained scores were further analyzed quantitatively using descriptive statistics and an independent sample t-test to identify the effectiveness of JRELM on students’ English mastery. The data results show that the JRELM for mobile learning significantly affects students’ English mastery. It is because the JRELM can be accessed at any time, it is provided with exciting learning materials, and it helps students focus on learning with relevant material according to the professional field. Thus, this study concluded that JRELM effectively improves students' mastery of English.