Development and Validation of Web-Based Interactive Learning Material Using the LUMI Application for Mastery of Polynomial Operations

This study aimed to develop and evaluate a web-based interactive learning material (WbILM) using LUMI to enhance Grade 8 students’ mastery of polynomial operations. Grounded in Mayer’s Cognitive Theory of Multimedia Learning and the ADDIE model, the study addressed gaps in students’ conceptual understanding. A developmental research design was employed, with expert validation and a pilot implementation among 39 students and 10 education professionals. Statistical analysis showed a significant improvement in post-test scores (M = 10.36, SD = 1.22, t = -3.263, p = 0.002), confirming the material’s effectiveness. Experts highly rated its content quality, design, and pedagogical soundness. The study concludes that integrating LUMI-based Web-based Interactive Learning Materials significantly improves mathematical learning outcomes. Future research should expand this approach to other mathematical concepts, further optimizing technology-enhanced instruction to support interactive and adaptive learning.