Heltiana Heltiana, et al. “Interactive Power Point On Human Movement System Material; An Effort To Improve Biology Learning Outcomes At Kaima Advent Middle School”. Konstanta : Jurnal Matematika Dan Ilmu Pengetahuan Alam, vol. 1, no. 3, Aug. 2023, pp. 206-13, doi:10.59581/konstanta.v1i3.1213.