SIMATUPANG, Jennifer Margaret; ANDINI, Putri; SAFIRA, Dina Farika; ZAHRA, Balqis Mutiara; PADILA, Septi Tri; HERAWATI, Herawati. Eco-Creative Learning: Inovasi Flash Card Berbahan Limbah Serabut Kelapa untuk Materi Operasi Hitung Bilangan Bulat pada Kelas IV SD . J-CEKI : Jurnal Cendekia Ilmiah, [S. l.], v. 5, n. 2, p. 524–533, 2026. DOI: 10.56799/jceki.v5i2.12979. Disponível em: https://al-haramjournal.co.id/J-CEKI/article/view/12979. Acesso em: 10 aug. 2026.