This study used an online concept mapping activity (CMA) featuring peer learning to enhance learning achievement in concept application. Ninety-seven graduate students participated in this study. The students who participated in the online CMA could later apply the concepts with significantly higher performance and greater fidelity than those who did not. Findings of this study advance CMA for concept learning and application by integrating new features into CMA that motivate students to adopt deep learning approaches and develop effective cognitive information processing ability for better concept application. (Contains 2 figures.)