This study aimed to determine the implementation of contextualization and localization teaching approaches and the academic performance of Grade six learners in Lumban Sub-office, Division of Laguna during the school year 2023-2024. The study used descriptive study to gather information about the participants. The respondents were all the public elementary teachers in Lumban Sub-office, Division of Laguna with a total of one hundred (100) teachers from the nine (9) different schools from Lumban Sub-office. The researcher administered a questionnaire to collect feedback from participants. Meanwhile, the study employed statistical tools such as weighted mean, standard deviation, frequency, percentage, and Pearson-R. The level of contextualization and localization teaching approaches were Very Highly Evident among the respondents. Moreover, forty-eight groups of students were classified as having a very satisfactory academic performance, twenty-three were classified as outstanding, nineteen were classified as satisfactory, and 10 fell under fairly satisfactory. On the other hand, the academic performance of Grade Six learners in relation to their general average is significantly impacted by the implementation of contextualization and localization teaching approaches in terms of culturally relevant pedagogy, language-based localization, community engagement, and experiential learning. Thus, the null hypothesis is rejected. The schools should encourage teachers to be more innovative and creative in their teaching approaches and not just stick to the available and common resources they have. They should introduce the use of assistive technologies and learning resources to both the teachers and the learners. The schools should also conduct professional development programs where teachers will learn more how to successfully make contextualized and localized resources and how these can be implemented in the teaching and learning process. Lastly, future researchers are recommended to conduct studies and give light to the contextualization and localization of teaching methods or approaches and its impact or effects to other factors/areas.