EFEKTIVITAS BAHAN AJAR E-MODUL INTERAKTIF BERBASIS ANDROID UNTUK PENINGKATAN PEMAHAMAN KONSEP LINGKARAN KELAS VI SD: Effectiveness Of Android-Based Interactive E-Module Teaching Materials To Increase Understanding Of The Concept Of Circles In The Fourth Grade Of Elementary School. FN [Internet]. 2021 Sep. 18 [cited 2025 Feb. 3];20(2):219-32. Available from: https://fenomena.uinkhas.ac.id/index.php/fenomena/article/view/61