Development of DUMADYA Learning Application: Bullying Prevention Efforts Through Strengthening High School Students’ Characters

Introduction: The phenomenon of bullying among high school students has become a serious problem that impacts character development, psychological well-being, social skills, and academic performance. Bullying can create an uncomfortable school environment, hindering students' ability to learn effectively. Objectives: This study aims to (1) test the feasibility of a learning application through expert and practitioner validation, (2) assess student responses to the use of the application, and (3) identify character values necessary to prevent bullying behavior. Methods: This research and development study involved teachers, students, and experts. Data were collected using validation sheets from experts and students. Descriptive statistical analysis was conducted using SPSS to evaluate the data. Results: The study resulted in the development of a learning application called DUMADYA (Digital Understanding Character, Morality, and Anti-Bullying Youth Application). Validation by media experts yielded an average score of 95.38, and material experts gave an average score of 88.5, indicating high feasibility. Student questionnaire results also showed positive responses toward the application's effectiveness in character building and bullying prevention education. Conclusions: The DUMADYA application is a feasible and effective tool for strengthening student character and promoting anti-bullying education. The character values identified as essential for preventing bullying behavior are integrity, empathy, tolerance, communication, and friendship.