The main purpose of the study is to determine the effect of extracurricular activities on the learner’s development and performance. Specifically, this study aimed: The following objectives were sought: to determine the level of values of extracurricular activities in terms of discipline, leadership, life skills, and stress relief; to measure the level of level of the learner’s development in terms of independent learning, goal-orientation, socialization, and self-efficacy; to test whether the level of values of extracurricular activities has a significant effect to the learner’s development; and to test the level of values of extracurricular activities has significant effect to the performance of the learners. The descriptive method was used to determine the level of students’ acceptance of popular culture using developmental methods of intercultural sensitivity. The primary respondents of this study were 275 out of grade 12 learners of Cluster 5 integrated schools in Laguna. The major instrument used by the researcher was a questionnaire checklist in obtaining needed information from many students. The questionnaires created by the researcher were evaluated. Analysis revealed that the level of values of extracurricular activities in terms of discipline, leadership, life skills, and stress relief and the level of the learner’s development in terms of independent learning, goal-orientation, socialization, and self-efficacy are “very high”. Lastly, it also revealed that discipline significantly enhances independent learning and socialization. Similarly, leadership significantly boosts socialization. Furthermore, life skills exhibit significant positive effects on socialization and stress relief. Furthermore, the study shows the significant effect of different values associated with extracurricular activities on the performance of learners. There is a significant effect of discipline on learner performance, leadership, life skills, stress relief. This means that regular participation in extracurricular activities requires commitment and consistency, fostering overall values of the learner in these values can transfer to their academic endeavors, leading to improved time management, study habits, and overall performance. Therefore, the null hypotheses have been rejected. Based on the drawn results and conclusions, it is therefore recommended that further research may be conducted to investigate the factors that influence the significance level of extracurricular among students who are not interested in any extracurricular activities, as this can aid in the development of more effective strategies for promoting diversity and inclusion in educational settings.