Abstract

This study aimed (a) to examine the effectiveness of a learning management plan using Phenomenon-Based Learning integrated with the 5W1H technique for Grade 5 students based on the 80/80 efficiency criterion, (b) to compare students’ reading comprehension performance against the 75% proficiency benchmark, and (c) to compare students’ writing communication performance against the same benchmark. The participants were 16 Grade 5 students from Ban Thanong Chai School in Surin Province, Thailand, during the second semester of the 2024 academic year. The research instruments included six lesson plans, a reading comprehension test, and a writing communication test, all validated by experts for content validity and reliability. The data were analyzed using mean, percentage, and standard deviation for lesson plan efficiency, and the Wilcoxon Signed Rank Test was employed for non-parametric comparisons of students’ performance against the set criteria. The results revealed that the learning management plan achieved an efficiency score of 86.08/86.67, exceeding the 80/80 standard. Furthermore, students’ posttest scores in both reading comprehension and writing communication were significantly higher than the 75% proficiency benchmark (p < .05).

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