This study was conducted to determine the instructional management operation and environmental integrity of teachers in public elementary schools in Manay North District, Division of Davao Oriental. A non-experimental quantitative research design employing the correlational method was utilized. The respondents of the study consisted of 131 public elementary school teachers, selected through universal sampling. Data were analyzed using the mean, Pearson correlation coefficient (r), and regression analysis. The findings revealed that the levels of both instructional management operation and environmental integrity among teachers were generally high. Moreover, a significant positive relationship was found between instructional management operation and environmental integrity, indicating that effective management practices are associated with higher professional and ethical standards among teachers. Regression analysis further showed that the domains of instructional management operation significantly influence the environmental integrity of teachers. Based on these results, it is recommended that school heads enhance the evaluation of teachers, particularly addressing areas where goals are less clearly defined or underachieved. Additionally, implementing recognition and reward systems for teachers who achieve high performance may further motivate and sustain effective instructional management and integrity in the school environment.