Statistics and probability have become the main knowledge to be taught in Math general education curriculum 2018. Teachers face many difficulties because they must teach new statistical content for the first time. In the context that one curriculum with many textbooks, teachers must proactively design the teaching content by analyzing the content and the competency required to be developed for learners and referring to domestic and foreign textbooks. Based on teaching statistics at a junior high school, our analysis shows that there is the appearance of charts and the relationship between them by grade level. Moreover, in this research a teaching design process has been developed, applied, and summarized into appropriate teaching contents. Teachers can refer to specific teaching activities in the paper related to the choice of data representation in the statistical charts and contribute to the development of mathematical communication competency. The proposed teaching situations are all practical. These practical contexts are close and consistent with the psychology of junior high schoolers.