Development and Validation of Math Instructional Material in Multi-grade Teaching Grades 5 and 6

This study aimed to develop and validate mathematics instructional materials for multi-grade teaching in Grades 5 and 6 at Bayugao Elementary School in Luna, Apayao. The research addressed the different challenges faced by teachers, learners in multi-grade settings, particularly the lack of appropriate and engaging resources for different learners and learning’s. Using the Research and Development (R&D) method, the study followed the stages of planning, designing, expert validation, pilot testing, and revision. The developed materials were assessed by experts in mathematics education or the master teachers and multi-grade teaching using a validation tool that evaluated content factor, format factor, organization and presentation factor and accuracy and up-to-datedness of information. Results showed that the instructional materials were “very satisfactory” in all criteria, indicating a high level of acceptability. Additionally, feedback from teacher-implementers and learners during the pilot phase revealed improved engagement and understanding of key mathematical concepts. The findings underscore the importance of contextualized, level-appropriate resources in enhancing teaching effectiveness and learning outcomes in multi-grade classrooms. The study recommends the wider adoption of the materials and further research into their long-term impact on learner performance.