FITRIANI, A. D.; BR GINTING, L. C.; PRABAWA, H. W. From Learning Obstacles to Conceptual Understanding: Developing GeoGebra-Assisted Teaching Materials for Elementary Fractions through Educational Design Research. Journal of Mathematics Instruction, Social Research and Opinion, Bandung, Indonesia, v. 5, n. 3, p. 2243–2256, 2026. DOI: 10.58421/misro.v5i3.1502. Disponível em: https://journal-gehu.com/index.php/misro/article/view/1502. Acesso em: 3 sep. 2026.