Hanifah, A. et al. 2022. SOME CONSTRAINTS IN IMPLEMENTING NUMBERED HEADS TOGETHER COOPERATIVE MODEL IN ONLINE LEARNING IN THE COVID-19 PANDEMIC. PENSA E-JURNAL: PENDIDIKAN SAINS. 10, 1 (Jan. 2022), 81–85. DOI:https://doi.org/10.26740/pensa.v10i1.41599.