Assessing SRBP-Based Instructional Materials: An Expert Judgment Approach

Abstract

The quality of elementary education is strongly influenced by the availability of instructional materials that are relevant, engaging, and aligned with learners' needs. This study aims to develop and validate a digital instructional material for Natural and Social Sciences (IPAS) based on the Scientific Reading Based Project (SRBP) approach, which integrates scientific literacy and project-based learning principles. The research employed a development methodology, involving analysis, design, development, and expert validation stages. Three groups of validators conducted expert judgment: subject-matter experts, media experts, and language experts, who covered aspects of content relevance, accuracy, visual presentation, media navigation, and linguistic quality. The results indicate that the instructional product meets the "good" category, with an average feasibility score of 79.2%. These findings suggest that the material is suitable for classroom implementation, with minor revisions needed, particularly in content accuracy, interactive language features, and visual design balance. The study concludes that the SRBP model effectively supports active, contextual, and literacy-oriented learning in elementary education. Further field testing is recommended to examine the material's practical impact on fostering 21st-century skills among students.