This study aims to develop Student Worksheets (LKPD) by integrating the Problem-Based Learning (PBL) model with Catur Pramana values. Utilizing the ADDIE framework, the research produced a science learning instrument tailored for elementary education. Expert validation confirmed the quality of the product with an Aiken’s V index of 0.77, indicating high validity. Furthermore, the effectiveness test revealed a significant enhancement in student performance, with average scores rising from 15.6 (pre-test) to 25.4 (post-test). With an N-gain score of 0.7 and an effectiveness rate of 68%, the developed LKPD is categorized as moderately effective and serves as a strategic tool for fostering students' science process skills..
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