Abstract:
This Lesson Study activity aims to improve the quality of statistics instruction by focusing on students’ ability to present data in graphics. This study occupied Think-Pair-Share, a cooperative model in designing the instruction. Students were paired in groups of two before they were randomly grouped in bigger groups; groups of three then groups of six. Bigger groups were formed after the smaller groups finish discussing and doing the assignments given by the teacher. The discussion was regarding graphics components, graphics procedures, and graphics selection in terms types and forms. The instruction process was done in two cycles in two parallel classes. From the first reflection, the teacher was suggested to pay attention the best time to use the graphics during the class as well as to evaluate students’ responses of the class. This study showed that students were more active during the class. It can be seen from the more relaxed learning atmosphere where students were more assertive and involved in classroom discussion. It can also be seen from their improved concepts of graphic mastery; students were able to choose the proper graphics according to the data. They were also able to make right conclusion about the presented graphics.
