The Effect of PBL-Based LPKD on Critical Thinking Skills of VII Grade Students at MTs Al Uswah Bergas on Environmental Pollution Material

Abstract

The study aims to know the effect of PBL-based LKPD on the critical thinking skills of VII students on environmental pollution material. This kind of research is quantitative. The quasi-experiment method was used, with a pre-test and post-test non-equivalent control group design. Population in class VII MTs Al Uswah Bergas designed 175 students. The sampling technique used was the purposive sampling technique. The research sample was 55 students. The number of samples in the experimental class was 26 students and 29 students in the control class. The instrument used was an essay question. The data analysis used was an independent t-test. The results of the independent t-test obtained Sig. (0,009) ˂ α (0,05) then H_a is accepted, so it is suggested that there are differences in students' critical thinking skills between the experimental class and the control class on environmental pollution material in class VII. The correlation analysis results obtained Sig. (0,000) ˂ α (0,05), so there is a correlation between two variables.  The regression analysis obtained Sig. (0,000) ˂  α (0,05) then H_a is accepted, with the regression equation is Y= 35,748 + 0,592X positive values, so, if the use of PBL-based LKPD increases, the ability to critical thinking will also increase. The coefficient determination in this research is 60,7 percent. The use of PBL-based LKPD affects the critical thinking skills of VII grade students at MTs Al Uswah Bergas on environmental pollution material.