2026 IJRSE – Volume 15 Issue 14
Available Online: 11 June 2026
Author/s:
Quiras, Carmelle R.*
Cagbolo National Vocational High School, Philippines (carmelle.quiras@deped.gov.ph)
Deri, Ritzelda A.
Sorsogon State University, Philippines (raderi@sorsu.edu.ph)
Abstract:
This study focused on the development and validation of a supplementary learning material, specifically a Mathematics Handbook on Integers for Grade 7 students at Cagbolo National Vocational High School during the School Year 2023–2024. The main purpose of the study was to improve students’ understanding of integers and enhance their reading comprehension and problem-solving skills in Mathematics. The participants were 32 Grade 7 students, composed of 18 Low Performing Group (LPG) and 14 High Performing Group (HPG), who were both exposed to the developed handbook. Their performance was measured using a teacher-made pre-test and post-test covering integer concepts and prerequisite skills, including reading comprehension in word problems. The validity of the instructional material was evaluated using the DepEd Learning Resource Management and Development System (LRMDS) standards, and a paired t-test was used to determine the significant difference between pre-test and post-test scores. Findings revealed that before the intervention, the LPG had difficulty in both integers and prerequisite competencies while the HPG showed only a fairly satisfactory level of performance, indicating a noticeable achievement gap. After the implementation of the Mathematics handbook, both groups showed significant improvement in their post-test results, with the achievement gap reduced and both groups reaching a satisfactory level of performance. The handbook, which included content-focused tasks, interactive exercises, critical thinking activities, production tasks, and problem-solving exercises, was found to be effective in improving students’ reading comprehension and mathematical skills. Overall, the study concludes that the developed Mathematics handbook is an effective instructional tool that enhances learning, bridges performance gaps, and supports the development of students’ comprehension and problem-solving skills in Mathematics, and it is recommended for use as both a remedial and instructional resource in Grade 7 Mathematics.
Keywords: integers, supplementary learning material, grade 7 mathematics, reading comprehension, problem-solving skills
DOI: https://doi.org/10.5861/ijrse.2026.26240
Cite this article:
Quiras, C. R., & Deri, R. A. (2026). Development and validation of supplementary learning material on Integers for Mathematics 7. International Journal of Research Studies in Education, 15(14), 135-155. https://doi.org/10.5861/ijrse.2026.26240
* Corresponding Author