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“Eighth Grade Students’ Geometric Writing Ability Based on Van Hiele’s Theory in the Geogebra-Assisted PBL Model”. EduGrows: Education and Learning Review 1, no. 2 (October 3, 2025): 143–154. Accessed July 7, 2026. https://ojs.sinesia.org/index.php/EduGrows/article/view/113.