The purpose of this study is to understand the impact of the montessori method-based multiplication board media on the understanding of the concept of multiplication among grade III MI students. The population studied consisted of 40 students. The research sample consisted of 40 students, where class III-A became an experimental class with 20 students and class III-B became a control class with 20 students. Data was collected using pretest and posttest. The results of the study show that students' understanding of the concept of multiplication is influenced by the multiplication board media based on the Montessori method. In the experimental class, the average score was 82.25 and in the control class was 76.75. The results of the hypothesis show a tcal value of 0.006 and a ttable of 0.05. Based on decision-making, if the tcount value is < table, it is stated that Ho is rejected and Ha is accepted at the level of α = 0.05. This shows that the multiplication board media based on the Montessori method has an influence on the understanding of the concept of multiplication by grade III MI students.
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