DEVELOPMENT OF AN E-LKPD BASED ON DIDACTIC DESIGN TO ADDRESS LEARNING OBSTACLES IN THE TOPIC OF FLAT-SIDED SOLID GEOMETRY

Hani Yupita Salwa, Syukrul Hamdi

Abstract


This study aims to develop a didactical design-based electronic student worksheet (E-LKPD) to address students’ learning obstacles in the topic of three-dimensional geometric solids. The study employed a Research and Development (R&D) approach using the ADDIE model integrated with didactical design principles. The product trial involved 34 eighth-grade students, two expert validators, and two teachers who assessed its practicality. Data were collected through observations, interviews, diagnostic tests, expert validation, questionnaires, and pretest-posttest assessments. Product validity and practicality were analyzed descriptively, while learning outcome improvements were examined using the N-Gain index and the Wilcoxon test. The identification of learning obstacles revealed three design priorities: strengthening visualization and representation, providing varied contexts for concept application, and introducing gradual learning activities to reduce students’ dependence on worked examples. These priorities were implemented through images, geometric nets, instructional videos, exploratory activities, guiding questions, contextual problems, feedback, and reflection. The validation results yielded scores of 70.3% from the media expert and 72.3% from the subject matter expert, both classified as valid. Media refinements focused on layout, readability, consistency, and navigation, while material improvements emphasized learning activities and their alignment with students’ learning obstacles. Teacher and student responses reached 90.00% and 86.23%, respectively, indicating a highly practical category. The mean learning outcome increased from 68.529 on the pretest to 89.529 on the posttest. The N-Gain score was 0.667, indicating moderate improvement. The Wilcoxon test revealed a statistically significant difference (p < 0.001), with an effect size of 0.879. The developed E-LKPD was valid and highly practical. However, the trial was limited to 34 students at one school over six instructional sessions and employed a one-group design without a comparison group. Therefore, further research involving larger samples and comparison groups is needed to examine the product's effectiveness.

Keywords


E-LKPD; Didactic Design, Learning Obstacles; Flat-Sided Geometric Shapes

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References


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DOI: https://doi.org/10.15548/mej.v10i2.15073

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