In this research, we attempted to support the learning of the UML modeling skills and social skills required in software development scenarios as part of programming education in the Department of Engineering. We conducted a class based on PBL in which the learners formed teams to build a robot using LEGO Mindstorms. The results confirmed that through the classes, the learners showed improvements in both modeling skills and social skills. These results demonstrate the educational effectiveness of class design based on PBL and using the theme of building a robot, and the effectiveness of the modeling template created through this research.