<![CDATA[Critical thinking skills are an essential competency in the Merdeka Curriculum to address the demands of 21st-century learning. These skills enable students to understand concepts deeply, analyze problems, and make appropriate decisions with the support of a deep learning approach. One effort to develop this competency is through the implementation of the Project-Based Learning model, which emphasizes project-oriented activities and active student engagement. In addition to instructional models, learning media also play a crucial role. E-LKPD (electronic student worksheets) is one such medium that can enhance student engagement while fostering critical thinking skills. This study aims to develop a PjBL-based E-LKPD on environmental change materials that meets validity and practicality criteria. The research employed the 4D development model, consisting of the define, design, develop, and disseminate stages. The measured parameters included validity and practicality. Validity was assessed based on presentation, content, and language, while practicality was evaluated through the implementation of learning and students’ responses. Data were analyzed using descriptive quantitative methods. The results showed that the E-LKPD achieved a validity score of 97.03% (very valid) and a practicality score of 98.09%, with student responses reaching 99.25% (very good). Critical thinking indicators were also achieved at a high level. Therefore, the PjBL-based E-LKPD is considered feasible as a learning medium to enhance students’ critical thinking skills.]]>
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