This correlational study examined the relationship between transformational leadership style and three situational factors (leader-member exchange or LMR, task structure or TS, and position power or PP) for successful operation at Assumption Samutprakarn School, Thailand. To meet the study’s objectives, all 99 administrators and academic departments of the target school were given a survey questionnaire to complete (Multi-Factor Leadership Questionnaire–to measure transformational leadership style, Situational Factor Questionnaire–to ...