First aid training on campuses is struggling with low skill retention and poor teaching outcomes. Data shows that only 2% of students maintain their basic first aid skills a year after training. This article tries to solve this problem by designing a mobile-learning module. People on campus can be divided into three categories—freshmen in dorms, lab researchers, and campus first aid responders. Based on Schrock's Communicative Affordances Theory, the author plans to design a location-aware, targeted, and efficient mobile learning module. The design includes three practical modules: an Emergency Assessment Framework that scales from basic assessment to incident-command protocols; a Common Campus Injuries module; and an Advanced Life Support module offering airway management with real-time performance feedback. The author designs the modules based on the concept of Learn-Practice-Assess. The designed learning module is expected to turn spare moments into intentional skill-building. The learning module is supposed to yield marked gains in accessibility and retention compared to other first aid training approaches. The author wishes that when life-saving knowledge lives in students' pockets, competency becomes a habit rather than a forgotten certificate.