Sabil H, Asrial A, Syahrial S, Robiansah MA, Zulkhi MD, Damayanti L, Kiska N, Silvia N, Ubaidillah U. Online Geoboard Media Improves Understanding of Two-dimensional Flat Shape Concepts in Elementary School Students. International j.of Elementary Education [Internet]. 2021 Dec. 5 [cited 2024 May 5];5(4):685-91. Available from: https://ejournal.undiksha.ac.id/index.php/IJEE/article/view/41785