The Effectiveness of e-LKPD Sience Based on Project Based Learning in Improving Critical Thinking Skills of Junior High School Students

Abstract

This study aimed to examine the effectiveness of an electronic student worksheet (e-LKPD) based on Project Based Learning (PjBL) on temperature and heat material in improving junior high school students’ critical thinking skills. The study employed a research and development approach using the ADDIE model, which consists of the stages of Analyze, Design, Develop, Implement, and Evaluate. The e-LKPD was validated by three experts to determine its validity, practicality, and feasibility before implementation. The implementation was conducted in class VII-F of SMPN 2 Jember. Data were collected through expert validation sheets, student response questionnaires, and critical thinking skill tests administered in the form of pretests and posttests. The results showed a significant improvement in students’ critical thinking skills after the implementation of the PjBL-based e-LKPD. The average pretest score increased from 55 to 88.75 in the posttest, with an N-Gain value of 0.75, categorized as high. Indicator-based analysis revealed that all critical thinking indicators improved, with the evaluation indicator achieving the highest N-Gain value of 0.87. These findings indicate that the PjBL-based e-LKPD is effective in enhancing students’ critical thinking skills and supporting active, meaningful science learning. Therefore, the PjBL-based e-LKPD can be used as an effective alternative learning material for teaching temperature and heat in junior high schools