Nurhakikah, U., and H. Hayaturraiyan. “INCREASING MATHEMATICS LEARNING OUTCOMES SPEED MATERIALS USING GROUP INVESTIGATION COOPERATIVE MODELS”. Jurnal Al Muta’aliyah: Pendidikan Guru Madrasah Ibtidaiyah, vol. 1, no. 2, Aug. 2021, pp. 96-108, doi:10.51700/mutaaliyah.v1i2.266.