Science, Technology, Engineering, and Mathematics (STEM) Approach to Improving Critical Thinking Skills Using the PBL Learning Model
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Abstract
The purpose of this study was to determine the effect of Science, Technology, Engineering, and Mathematics (STEM) approach to the improvement of critical thinking skills using PBL learning models. The population of the research is all of 10th graded IPA’s students in SMA Negeri 7 Bandar Lampung which is 233 students. The selection of research sample uses a purposive sampling technique with the sample of class X IPA 5 was 31 students as the experimental class and class X IPA 6 was 30 students as the control class.The research design used Non-Equivalent Pretest Posttest Control Group Design. Data were tested by N-gain analysis, normality test, homogeneity test, Mann-Withney U Test and Effect size test. The results showed that there was an effect of the STEM approach to improving critical thinking skills as indicated by the Sig. (2-Tailed) is less than 0.05, 0.000, and the average value of N-gain (g) critical thinking skills in the experimental class is 0.73 (high category) and the control class is 0.56 (medium category). Effect size shows a value (d) of 1.49 included in high category. It can be concluded that the application of STEM approach using PBL learning models can improve students' critical thinking skills.
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