Pengembangan E-LKPD Berbasis STEM dalam Pembelajaran IPA untuk Meningkatkan Kemampuan Berpikir Kritis Siswa SMP

Abstract

This research is driven by the low critical thinking skills among students and the limited availability of interactive teaching materials. The study aims to develop a STEM-based (Science, Technology, Engineering, and Mathematics) Electronic Student Worksheet (E-LKPD) to enhance the critical thinking skills of junior high school students on the topic of Work, Energy, and Simple Machines. The research and development (R&D) method follows the ADDIE model, involving 22 students from SMPN 2 Maesan as research subjects. Data collection instruments included validation sheets, observation of learning implementation, student response questionnaires, and pre-test and post-test questions to measure improvements in critical thinking. The results indicate that the STEM-based E-LKPD is highly feasible, with a validity percentage of 99,31% (Very Valid) and a practicality percentage of 94,99% (Very Practical). The effectiveness of the E-LKPD is evidenced by a significant increase in students' critical thinking skills, with the average pre-test score rising from 31,91 to 86,37 in the post-test, resulting in an N-gain score of 0,8 (High category). Additionally, students provided very positive feedback with a response percentage of 98,96%. In conclusion, the developed STEM-based E-LKPD is a valid, practical, and highly effective tool for improving the critical thinking skills of junior high school students in science education.