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Sitompul I, Surya E, Togi T. Differences Ability of Visual Thinking Representation Mathematic and Student Learning Independence Between Student Who are Given an Open Ended Approach and Jigsaw Type Cooperative Model MTS Lab UIN SU Medan. IJSBAR [Internet]. 2017 Oct. 8 [cited 2024 May 2];36(3):150-63. Available from: https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/8129