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Nirwana, M., Mohamad Nur and Budi Jatmiko 2021. The Problem-Solving Skills Profile of Tsanawiyah Islamic School Students in the Vibration, Wave, and Sound Learning Materials. IJORER : International Journal of Recent Educational Research. 2, 2 (Mar. 2021), 158-170. DOI:https://doi.org/10.46245/ijorer.v2i2.86.