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The purpose of this research was to develop an e –Learning lesson on basic indoor electricity for level 1 indoor electricians, determine its quality and efficiency, compare student achievement between a pre-test and post-test, and measure student satisfaction with program. The population of this study was 30 third-year students from the Department of Electrical Power, Minburi Technical College. The tools for data collection were e-Learning Lesson, a quality evaluation form, and an achievement test. The statistics utilized for data analysis were percentage, mean, standard deviation, and t-test. It was found that the quality of e-Learning Lesson was at the level ( = 4.55, S.D. = 0.43) while the media production technique was at a good level ( = 4.40, S.D. = 0.14). The efficiency of e-Learning Lesson or the pass rate was 82.49%, in accordance with the specified hypothesis ≥ 80%. When the pre-test and post-test were compared, it was found that the average of posttest scores ( = 71.77, S.D. = 3.53) was statistically higher than the pretest ones ( = 46.97, S.D. = 3.42) at the 00.05 level. Student satisfaction was at the most level level ( = 4.30, S.D. = 0.57)
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