Development of Mathematics Learning Devices on Sequence-Arithmetic Topic with Problem Based Learning Model

This study aims to produce a valid, practical and effective learning tool to teach the topic 'Arithmetic Sequences in class X SMK. The learning tools in question include Learning Implementation Plans, Student Worksheets, and Learning Outcome Evaluation Instruments designed according to the Problem Based Learning model. This goal is achieved by conducting research on the development of the Thiagarajan model or what is known as the modified 4-D model. Modification of the model is done by eliminating the Disseminate Stage due to the limitations of the researcher in terms of time and finance. The results showed that the quality of the developed device met the aspects of validity in the 3rd round of assessment. The practicality and effectiveness of the developed device was achieved after the 2nd round of trials. These results indicate that the objectives of this development research have been achieved, namely that valid, practical and effective learning tools have been obtained to teach the Arithmetic-Sequence topic in high school class X.