<![CDATA[This study was motivated by observations indicating low levels of active engagement and academic achievement among fifth-grade students in the Pancasila Education subject, largely due to a lack of innovative, student-centered learning materials. The primary objective of this study was to develop student worksheets based on Inquiry-Based Learning (IBL) that meet criteria for validity, practicality, and effectiveness in order to improve student learning outcomes. The study employed a Research and Development (R&D) approach using the [Select one: ADDIE / 4D] development model. The research subjects comprised all fifth-grade students at UPTD SDN Lajing 5. Data collection instruments included validation sheets to assess product validity, response questionnaires to measure practicality, and test instruments (pre-test and post-test) to evaluate the effectiveness of learning outcomes. The collected data were analyzed using both quantitative and qualitative descriptive methods. The development results indicate that: (1) the IBL-based worksheets were rated as highly valid for use based on assessments by subject matter, media, and language experts; (2) the worksheets met high practicality criteria based on the percentage of positive responses from the class teacher and students; and (3) the worksheets proved significantly effective in improving student learning outcomes, evidenced by a marked increase in scores between the pre- and post-implementation stages (yielding a high N-gain score). Through the process of independent discovery facilitated by these worksheets, students developed critical thinking skills and gained a deeper understanding of Pancasila Education concepts. Based on these findings, it is concluded that the IBL-based worksheets are highly recommended for implementation as an innovative solution for Pancasila Education instruction in elementary schools.]]>
