THE EFFECT OF PROBLEM-BASED LEARNING MODEL ON STUDENTS’ MATHEMATICAL PROBLEM- SOLVING ABILITY OF CLASS VIII AT SMP NEGERI 35 MEDAN

This research aims to find out whether there is an influence of the PBL on junior high school students' mathematical problem-solving abilities. Problem-solving ability in this research is ability of students to solve contextual problems in Number Pattern topic. This research is quantitative research using quasi-experimental analysis and Pretest-Posttest Control Group Design experimental design. The population in this study were all students at SMP 35 Negeri Medan with samples taken from VIII-6 as control class being taught using the conventional model and VIII-7 as experiment class taught using Problem-Based Learning model. The data collection technique is an essay test of problem-slving ability in the form of a pre-test and post-test. Testing the requirements for this data analysis is a normality test and homogeneity test where the results show that the data is normally distributed and homogen. To test the hypothesis in this research using the independent sample t-test using IBM SPSS Statistics ver. 26. The t-test results from output shows a calculated t-value of 12.214 with a significance of 0.000. Because the significance is and ( ) ( ), then is rejected and is accepted. So, it can be concluded that there is an effect of Problem-Based Learning model on the mathematical problem-solving ability of class VIII students at SMP Negeri 35 Medan.