Implementation of Problem Based Learning E-Module to Improve Students' Critical Thinking Skills in Green Chemistry

Abstract

Technology development affects the quality of learning activity, so it needs some IT-learning-based media development. The purpose of the research to determine the effectiveness of using Problem Based Learning (PBL) e-modules in improving students' critical thinking skills in green chemistry Class X SMA/MA. This study was a quasi-experimental by using a nonequivalent control group design. The samples of the study consisted of 2 classes, namely X1 and X2. The sampling technique is a purposive sampling technique. The analysis results using independent sample t-test showed a significance value of 0.000 < 0.05. The data analysis results of critical thinking skills used N-gain score test; the experimental class obtained a score of 0.72, in which it belonged to the high category. Meanwhile, the average N-gain score for the control class was 0.47, in which it belonged to the medium category. It can be concluded that there is a significant difference in the students’ critical thinking skills between the experimental class and the control class. Therefore, the implementation of Problem Based Learning e-module can be an alternative to improve the students’ critical thinking skills in green chemistry Class X SMA/MA.