This study aims to develop an online-based collaborative project learning model design that can improve students' abilities in developing teaching materials. The method used is research and development. Data collection instruments are questionnaires and rubrics. Data analysis used descriptive statistics. The validation test used the individual content validity index and the overall content validity index. The Collaborative Project Online Learning (CPOL) model developed consists of six stages in learning: (1) orientation, (2) understanding project concepts and tasks, (3) designing and determining project themes, (4) working on project assignments, (5) presenting project assignments, and (6) evaluating project assignments. The results show that the content validity index shows a good category. Students are also good at developing teaching materials. Thus, the design of the CPOL model can be used in the course of developing teaching materials in higher education.