The Development of Thai Subject Learning Achievement Using Online Lessons for Grade 9 Students at Phipoonsangkarakpracha-Utit School

Abstract

This study aims to develop an effective online Thai language lesson for Grade 9 students based on the 80/80 criterion, compare student achievement before and after using the online lesson, and assess student satisfaction. The samples used in this research were Grade 9 students at Phipoonsangkarakpracha-Utit School in the second semester of the 2024 academic year. The samples of 37 students were obtained through purposive sampling. The research instruments included 1) online lessons 2) lesson plans 3) Thai achievement test 4) a student satisfaction. Data analysis to find the efficiency of online lessons according to the standard criteria 80/80 using mean and standard deviation. Analyze the students' satisfaction with online lessons in Thai subjects for Grade 9 students by dependent sample T-test. The research results showed that: 1) The online lessons demonstrated an efficiency ratio (E1/E2) of 80.10/80.81, meeting the 80/80 standard criterion. 2) Students’ post-test scores (x̄= 15.27, SD = 2.59) were significantly higher than their pre-test scores (x̄= 10.19, SD = 1.47), indicating that online lessons effectively improved learning outcomes (t = -21.44, p < .001). 3) The grade 9 student expressed satisfaction of learning Thai subjects through online lesson with an overall rating at the highest level (x̄= 4.95, S.D.=0.10)