This study aimed to determine the extent to which localized educational materials adapt to learning outcomes in elementary schools. The study employed a quantitative descriptive research design, with 109 out of 225 teachers from five elementary schools serving as respondents. The findings revealed that the level of adaptation of localized educational materials, in terms of active participation in class activities, understanding of lesson content, Interest in the subject matter, Collaboration with peers, and teachers often using the ability to apply learned concepts, contributes positively to their teaching practices. While the level of student academic achievement in elementary schools using localized educational materials was often observed in terms of Performance in subject-based assessments, Critical thinking and problem-solving skills, Retention and application of learned knowledge, Improvement in standardized test scores, and Mastery of core competencies. A significant relationship existed between adapting students' localized educational materials and academic achievement. Domains of management that influence the adaptation of students' localized educational materials include active participation and understanding of lesson content, Interest in subject matter, Collaboration with peers, and ability to apply learned concepts, which significantly influence students' academic achievement. This study recommends that teachers integrate adapted, localized materials in the classroom by making learning relevant and meaningful to students through their local contexts and experiences.