This research aims to: 1). Knowing the level of validity, effectiveness and practicality of learning tools developed with the problem based learning model. 2). Knowing the increase in students^ interest in learning after using learning tools with problem based learning models. The type of research used is Research and Development (R&D). This development research refers to the 4-D model put forward by Thiagarajan (1974), namely define, design, develop, disseminate. However, in this study the problem-based learning development research was modified into 3-D, which was limited to the develop stage. The assessment instrument used is the Learning Devices assessment sheet to measure the validity of learning devices and learning interest tests.
Keywords: Learning Devices, Learning Interest, Problem Based Learning, Validation, 4-D
