This paper explores the effectiveness of Diversity, Equity and Inclusion (DEI) programs in enhancing the education outcomes in Southeast Asia because it is necessary to develop evidence-based knowledge about the role of DEI in improving student achievement and equity. The study is inspired by the increasing regional educational inequalities and the rising importance of DEI in education policy-making. The data were collected using a quantitative, cross-sectional design in a survey of 296 education practitioners using an online survey and using SPSS to analyse the data. The analysis encompassed the descriptive statistics and ANOVA testing to define the impact that four factors influence student outcomes, i.e. Inclusive Teaching Practices, DEI Leadership Support, Resource Availability and Teacher Professional Development, are DEI-related.

The findings indicate that the general model explains educational outcomes significantly with the four independent variables explaining 85.1% of the variance. Professional development of teachers was found to be the most predictive factor, then resource availability, and leadership support. However, no significant effect was observed with inclusive teaching practices, which implies some gaps in implementation or training. The findings imply that structural and capacity-building aspects of DEI are important to enhance learning outcomes within the region. The research suggests specific investment in educator training, fair resource allocation and accountability of the leadership to improve the success of the DEI programs