Developing Realistic Mathematics Problems Based on Sidoarjo Local Wisdom

Education currently only prioritizes mastery of scientific aspects and students' intelligence. Math problems are still related to fictitious general knowledge. For this reason, local wisdom-based learning is needed whose learning is packaged using objects, events, and various things that are close to students' lives to raise the local potential of regions in Indonesia. Therefore, the researchers developed Realistic Mathematics Problems Based on Local Wisdom (RMPBLW) Sidoarjo. The question is expected not only as a measuring tool for students but also as a step in character building by introducing local cultures to students. The purpose of this study was to develop mathematical problems based on Sidoarjo's local wisdom on valid and reliable flat-shaped materials. This type of research is research and development or Research and Development (R&D). This study uses 3 stages of test tests, namely expert validation to test the feasibility of the questions, test the practicality in terms of readability of the questions with small group students, and test the validity of the items and the reliability of the questions with quantitative methods. This study produced 15 mathematical questions based on Sidoarjo's local wisdom on flat-shaped material that had been declared valid with an r-[subscript value] > r-[subscript table] (0.4438) and was declared reliable with a reliability value of 0.97.