Abstract

This study aimed to investigate the needs and develop guidelines for improving competency-based instruction for teachers in small-sized secondary schools under the Office of Nakhon Ratchasima Secondary Education. The research gathered data from 216 teachers drawn by using a stratified random sampling method, the sample size was determined by Krejcie and Morgan’s table (1970). Data were collected through a five-level rating scale questionnaire with an Index of Item Objective Congruence (IOC) between 0.80 and 1.00 and a reliability score of 0.96. Statistical analysis methods included frequency, percentage, mean, standard deviation, t-test, and the Modified Priority Needs Index (PNIModified).

The results revealed two significant areas of need: (1) improving teachers’ knowledge and skills in designing competency-based learning management and (2) enhancing their ability to implement competency-based instruction in classrooms. Based on these findings, three key development guidelines were recommended: (1) practical training workshops, (2) coaching and mentoring programs, and (3) collaborative lesson development through professional learning communities. The study highlighted the critical importance of competency-based instruction in equipping students with essential 21st-century skills. It underscored the need for structured teacher development programs, particularly in resource-limited educational settings.

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