Selecting a sustainable construction contractor with sufficient capacity and experience is one of the critical factors in ensuring the quality and effectiveness of school construction projects. However, this selection process is often challenging due to its multi-criteria nature and inherent uncertainties in evaluation. This multi-criteria nature makes contractor selection a complex decision problem requiring systematic evaluation of trade-offs. This paper applies the Evaluation based on Distance from Average Solution (EDAS) to evaluate and rank construction contractors for a school construction project in Ho Chi Minh City. Through a comprehensive review of domestic and international literature and construction expert interviews, the study identifies 26 core criteria for selecting a sustainable construction contractor of school projects. The research findings contribute to systematizing essential criteria for contractor evaluation while proposing a novel contractor selection method grounded in both scientific and practical foundations. This approach enhances the efficiency and objectivity of the decision-making process, assisting project owners and managers in the education sector in making optimal contractor selection decisions.