zainidar zainidar, “Effect of Jigsaw Type Cooperative Learning Model on Mathematics Learning Results of Grade II Students SDN 20 Situng: Pengaruh Model Pembelajaran Kooperatif Tipe Jigsaw Terhadap Hasil Belajar Matematika Siswa kelas II SDN 20 Situng”, JVEIT, vol. 1, no. 2, pp. 65–70, Oct. 2020.