The purpose of this study was to determine the effect of the CORE learning model assisted by Macromedia Flash 8 on students' mathematical problem solving abilities. This research method uses Groub Design Posttest-Only Control. The population in this study were all eighth grade students in State Middle School 15 Palembang in the 2018/2019 school year. The study sample was 59 students consisting of 30 students from class VIII.9 as the experimental class and 29 students from class VIII.8 as the control class. Samples were taken using Simple Random Sampling techniques. Data was collected through tests of students' mathematical problem solving skills in relation material and functions. The data analysis technique used in this study is the Independent Sample T-Test t-test. The results of the Posttest analysis mean the value of the experimental class is 80.34 and the average value of the control class is 73.10. Research shows that there is a significant effect of the CORE learning model assisted by Macromedia Flash 8 on mathematical problem solving abilities of students of Palembang State Middle School 15.
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