<![CDATA[Students' environmental awareness remains low, and the use of interactive learning media in environmental change lessons is still limited. This study aimed to develop a Problem Based Learning (PBL)-based Electronic Student Worksheet (E-LKPD) on environmental change materials to foster the environmental awareness of tenth grade senior high school students. This study employed a Research and Development (R&D) approach using the ADDIE model (Analysis, Design, Development, Implementation, and Evaluation). The research subjects consisted of 35 students from Class X-10 at SMA Negeri 8 Surabaya. Data were collected using expert validation sheets, learning implementation observation sheets, student response questionnaires, and environmental awareness questionnaires. The results showed that the developed E-LKPD achieved a theoretical feasibility score of 98.9%, categorized as very valid, comprising presentation aspects (98.8%), content aspects (100%), and language aspects (100%). The practical feasibility was indicated by the implementation scores of 96% for E-LKPD I and 94% for E-LKPD II, while the student response score reached 99%, indicating that the product was very practical. The effectiveness of the E-LKPD was demonstrated by the improvement in students' environmental awareness, with an N-Gain score of 0.73, which falls into the high category. Based on these findings, it can be concluded that the Problem Based Learning-based E-LKPD on environmental change materials is very valid, highly practical, and effective, making it suitable for use as a learning medium to foster the environmental awareness of tenth-grade senior high school students.]]>
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