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Moru EK, Malebanye M, Morobe N, George MJ. A Van Hiele Theory analysis for teaching volume of threedimensional geometric shapes. J.Res.Adv.Math.Educ [Internet]. 2020 Dec. 16 [cited 2025 Nov. 17];6(1):17-31. Available from: https://journals2.ums.ac.id/jramathedu/article/view/9331