Sabrina, N. and Arif, K. 2023. The Effect Of Numbered Head Together (NHT) Cooperative Learning Model On Students Learning Outcomes On Human Respiratory System Materials At SMPN 2 Solok City. Universe. 4, 1 (Jun. 2023), 26-31. DOI:https://doi.org/10.24036/universe.v4i1.341.