… ; 3) the ability to reason and communicate; 4) the ability to think creatively and innovatively. Mastery … student learning outcomes in conventional groups. So that it can be concluded that the problem-based learning device developed can improve students' problem solving abilities…
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Frine Tamba, E., Syafari, S., Siagian, P., & Laurence Sihotang, M. (2019). Development of Realistic Mathematics Education-Based Learning Devices to Improve Mathematical Problem Solving Skills of SMP Negeri 1 Medan Students. American Journal of Educational Research, 7(1), 1–5. https://doi.org/10.12691/education-7-1-1