<![CDATA[This study is driven by the necessity to create modern and relevant educational materials tailored to the demands of contemporary learning in the digital age. The objective of this research is to develop a Problem-Based Learning (PBL)-oriented E-Worksheet (E-LKPD) focused on two-dimensional shapes for seventh-grade students at SMP Negeri 7 Kisaran, ensuring it is valid, practical, and effective. A Research and Development (R&D) method is utilized for this study. The Thiagarajan model, often referred to as the 4-D Model, serves as the guiding framework, comprising four phases: define, design, develop, and disseminate. The tools used in this research consist of validation forms, questionnaires for both teachers and students, and tests to assess conceptual understanding. According to the evaluations from the validators, the E-LKPD achieved a final validity score of 92%, which is considered highly valid. The practicality, determined by the feedback from teachers and students, scored 93%, indicating it is very practical. The effectiveness of the E-LKPD, assessed through the conceptual understanding test results, reached 88%, categorizing it as highly effective. From these results, it can be inferred that the PBL-based E-LKPD supported by Liveworksheets on two-dimensional shapes for seventh graders is indeed valid, practical, and effective.]]>
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