Using Projects-Based Learning in Improving Students' Critical Thinking Skills to Recycle Waste Cooking Oil

Indah Ningtyas Andalas Putri (Department of Chemical Education, Faculty of Teacher Training and Education, University of Lampung, Bandar Lampung, Indonesia)
Noor Fadiawati (Department of Chemical Education, Faculty of Teacher Training and Education, University of Lampung, Bandar Lampung, Indonesia)
M. Mahfudz Fauzi Syamsuri (Department of Chemical Education, Faculty of Teacher Training and Education, University of Lampung, Bandar Lampung, Indonesia)

IJCER (International Journal of Chemistry Education Research)
VOLUME 3 ISSUE 1, FEBRUARY 2019

This study aims to describe the effectiveness of project-based learning in improving students' critical thinking skills. The research design used was the matching only pretest and posttest control group. The population in this study were all students of class XI MIPA, one of the high schools in Bandarlampung. The research sample was students of class XI MIPA 6 and XI MIPA 4. The data analysis technique used is the non parametric statistical test using U Man Whitney. The results of the study showed that the average posttest of critical thinking skills in the experimental class was greater than in the control class. the average n-gain in the experimental class is medium and low in the control class, indicating that project-based learning is effective in improving students' critical thinking skills. Keywords: critical thinking skills, waste cooking oil, project-based learning