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‒Numbered Heads Together (NHT) model used a series of delivery of materials by using groups as a container in unifying students perceptions/ minds to questions asked or asked teachers, which will then be accountable by students in accordance with the teachers request number each group. This research aimed to know: the effect of cooperative learning model type NHT assisted video media on students natural science achievement; the effect of motivation students natural science achievement and interaction between learning model and motivation in increasing students natural science achievement. This research was a quasiexperimental research. Instruments in this research were objective test of natural science and questionnaire motivation in learning. Data analysis technique used was two-way Analysis of Variance at significant level alpha 0.05. The results of this research showed that: there was an effect of cooperative learning model type NHT assisted video media on students natural science achievement, with value of significant 0.000; there was effect of motivation on students natural science achievement, with value of significant 0,000 and there was an interaction between learning model and motivation in increasing students natural science achievement with value of significant 0.031. Keywords‒‒Cooperative learning model; motivation; natural science achievement

The Effect of Cooperative Learning Model Type Numbered Heads Together (NHT) Assisted Media Video and Motivation on Natural Science Achievement of Elementary School Students