The lack of research development on 21st-century learning models that can improve the six competency skills of Geography Education students at Universitas Lambung Mangkurat Indonesia and its integration in wetland environment management became the background for developing the Flipped-Case Project Model. This model results from the development of case methods and team-based projects, one of the efforts to improve six competency skills in learning innovation. This development consists of five stages: analysis, design, development, implementation, and evaluation. The results of this study showed that the novelty of the development of this model was seen in the learning syntax, including group formation, determining the topic of wetland management, mini-research, case finding by students, group discussion, presentation of reports, presentation of results, mini lecturers, and evaluation in the form of feedback. The Flipped-Case Project model has been declared feasible and effective for improving six competency skills as a learning model in the study of wetland environment management at the Geography Education Study Program, Universitas Lambung Mangkurat. The implications of this research as an alternative geography learning model that can improve students' six competency skills in the 4.0 education era. In addition, as a guide for further research to be implemented in other courses in higher education.