Based on background knowledge of this research was understanding of mathematical concept still low and their habit was waiting the answer from their friend. This research is to determine whether studentsâ understanding of concept mathematics by using Quiz Team strategy better than studentsâ understanding of concept mathematics by using conventional strategy at VIII SMP N 4 Koto Baru. Type of this research was experiment. Population of this research was students at VIII SMP N 4 Koto Baru, and sample of this research was students class VIII.B as experimental class and VIII.A as control class. Post-Test was as instrumentation in this research, with reliability 0.93. From the data analysis get mean score from studentsâ achievement in experimental class was 56.58 that high rather than in control class that was 36.36. Data analysis was done by using hypothesis testing. Tcalculated= 2.88 and ttable= 1.68. Â so hypothesis was acceptable. So, we can conclude that studentsâ understanding of concept mathematics that used Quiz Team strategy better than conventional strategy at VIII Grade of SMP N 4 Koto Baru.
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