<![CDATA[This study aims to create innovation in LKPD through the development of LKPD using the PjBL model assisted by the Assemblr Edu application. The 4D development model which includes: (1) definition, (2) design, (3) development, and (4) dissemination. The subjects of this are Xth class students of SMAN 1 Tanjung Tiram. The LKPD validation sheet, ability test, teacher and student response surveys, and learning activity observation sheet are some of the research tools used. The validation test is carried out by 3 validators, the practicality test is carried out by teachers, and 36 experimental students are used to evaluate the feasibility of LKPD, while the effectiveness test is carried out by 36 experimental class students and 36 control classes. Considering the findings of the data analysis, the LKPD validity test obtained a validity percentage of 88%, categorized as "very valid". Thus, the LKPD made is considered valid. Due to the test of student responses, 85% of respondents were classified as "practical", and the findings of the teacher response analysis resulted in a classification 83% as “practical". Meanwhile, 83% of the ability test results fell into the "effective" category, and the "very effective" category with an average percentage of 94% in the activity observation analysis results. Therefore, the LKPD with the help of the Assemblr Edu application can be used at Xth Class Students of SMA Negeri 1 Tanjung Tiram in 2024/2025 Academic Year. Keywords: Student worksheets, PjBL model, Concept understanding]]>
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