<![CDATA[This research aims to develop a Problem-Based Learning E-LKPD as a differentiated learning media for Systems of Linear Equations with Three Variables (SPLTV) material for grade X vocational high school, addressing problems of limited teaching materials supporting differentiated learning, dominance of lecture methods, and students' difficulties in understanding SPLTV material. The research employs Research and Development (R&D) method with ADDIE model consisting of analysis, design, development, and implementation stages, involving expert validators (material, media, and language) and 30 students from grade X DKV at SMK Negeri 1 Tanjungpinang. The E-LKPD product was developed using Articulate Storyline 3 with content differentiation based on three learning achievement levels (Code A, B, and C) following Problem-Based Learning syntax. Expert validation was conducted using validation sheets analyzed with Likert scale, yielding results of 93.75% for media expert (very valid), 86.25% for language expert (very valid), and 80% for material expert (valid), with an overall average of 86.67% (very valid category). Practicality testing was conducted using questionnaires distributed to teachers and students, resulting in 88.57% teacher practicality (very practical) and 90% student practicality (very practical), achieving an overall practicality level of 89.28% (very practical category). This E-LKPD product is proven valid and practical to support Problem-Based Learning differentiated learning on SPLTV material, providing flexibility for students to learn according to their learning achievement levels and offering an effective alternative to traditional lecture-based teaching methods]]>
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