Engineering Economics is a core course for the Engineering Cost major in application-oriented undergraduate universities, yet traditional teaching often suffers from a theory-practice gap, low student participation, and polarized academic performance. Guided by Outcomes-Based Education (OBE), this study developed a three-in-one project-driven teaching model integrating modular theory, whole-process project practice, and diversified assessment. Theoretical content was reorganized into four application modules within a closed-loop ``lecture-practice-assessment'' process. A real local project---the renovation of an unfinished building into affordable rental housing in Zhaoqing City---served as... More >