This research is motivated by the result of lower-grade students learn math IVA SDN 55 Kesumbo Ampai, seen from the average value of the class 66.23. Therefore, the researchers provide an alternative to the implementation of cooperative learning model learning NHT in the class IVA SD Negeri 55 Kesumbo Ampai. This research aims to improve learning outcomes Mathematics IVA grade students of SD Ne…