EFFECTIVENESS OF CONTEXTUALIZED AND LOCALIZED ACTIVITY SHEETS IN SCIENCE 5 INTEGRATING CLIMATE CHANGE ADAPTATION: SUSTAINABILITY AND ADVOCACY FOR CLIMATE ACTION KIM ALVIN C. DE LARA INTRODUCTION Schools play a major role in the education of tomorrow's generation and future of the earth. As stewards of the earth, helping students understand climate change, its impacts and its solutions prepares them to take an active role in making good choices for both society and the environment. This research aimed to assess the effectiveness of contextualized and localized activity sheets in Science 5 integrating climate change adaptation to grade five pupils of Niogan Elementary School SY 2017-2018. Funded by the Department of Science and Technology-Science Education Institute, the activity sheets gave grade 5 pupils the necessary knowledge, skills and awareness on climate change, lessen and reduce the effects of risks through educational and environmental stewardship and resilience and manage and use it in productive ways as they apply it to their day to day live. METHODS An experimental research method was utilized. The main instrument used was the pre and post-test questionnaires. Content validation and item analysis were conducted prior to the conduct of experimentation. The activity sheets adhered to the Grade Level Standards of the K to 12 Science Curriculum prescribed by the Department of Education. Anchored on grade 5 Science learning competencies, a 15-day lessons were used using the activity sheets during the 4th Quarter of the school year. Participants were the one hundred sixteen (116) Grade 5 pupils selected purposively by the researcher. RESULTS Based from the findings, results showed that there is a significant improvement in the performance of Grade 5 pupils after using the activity sheets, an improvement in the mean percentage score was also reflected in 4th Quarter test result. Also after the conduct of interview and focus group discussion among participants, the activities in the activity sheets was said to be an effective learning tool and material to pupils. After the conduct of the research, projects and advocacy programs for sustainability were created, shared and advocated through social media, community linkages and forums in different schools and communities. DISCUSSION The researcher strongly supports environmental education and believes this to serve as a way to instill environmental literacy to students. Climate change awareness should be a part of the science curriculum because student knowledge of environmental concepts establishes a foundation for their future understandings and actions as citizens of the country. Keywords: Climate Action, Activity Sheets, Sustainability, Contextualized, Localized