This research aims to determine the effectiveness of the erroneous solution method on learning the line graph, mean, median, and mode at 7 th grade. This is a semi-experimental study model based on teaching the concepts of statistics with erroneous examples. The participants of the study were randomly selected 70 students studying in the 7 th grade in the 2018-2019 academic year. Eight activities that involve erroneous examples were used during the data collection process and an achievement

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... was conducted as pre-test and post-test before and after classroom implementation. The obtained data were analyzed using the SPSS package program. In order to examine the effect of activities, a t-test was performed. The results of the analysis revealed that the erroneous solution method had a positive effect on learning the concepts of line graph, mean, median, and mode.