Rini, Zulmi, Kartono Kartono, and Isti Hidayah. 2019. “Conceptual Understanding of Class V Students Judging from Curiosity on Learning Models Group Investigation With Hands on Activity Assisted by Teaching Aids.”. Unnes Journal of Mathematics Education Research 8 (2), 229-35. https://journal.unnes.ac.id/sju/ujmer/article/view/28641.