In the 21st century, education demands innovative approaches that bridge disciplinary boundaries to foster holistic learning. The integration of interdisciplinary performance tasks has gained traction as an effective strategy to enhance students critical thinking, collaboration, and problem-solving skills. At Talangan Integrated National High School, an integrated performance task was implemented for Grade 11 STEM learners, aiming to assess its impact on academic performance while aligning with the Sustainable Development Goals (SDGs). This study explored how interdisciplinary tasks influence learners academic achievement across six core subjects: Reading and Writing, Pagbasa at Pagsusuri, Statistics and Probability, Physical Science, Personal Development, and Health Optimizing Physical Education. This action research utilized a mixed-methods approach, involving 245 Grade 11 learners. Quantitative data were collected from students academic records and analyzed using a paired t-test to determine significant differences in academic performance before and after the intervention. Qualitative data were gathered through surveys and focus group discussions to examine students perceptions, challenges, and benefits of the integrated task. Findings revealed a statistically significant improvement in students academic performance, indicating that interdisciplinary tasks contribute to deeper learning, enhanced problem-solving abilities, and improved engagement with real-world issues. Thematic analysis further highlighted key benefits such as increased teamwork, better conceptual understanding, and motivation to apply knowledge across disciplines. However, challenges such as time constraints, varying levels of engagement, and coordination among subject teachers were also noted. Based on the findings, the study recommends institutionalizing interdisciplinary performance tasks with enhanced teacher collaboration, incorporating real-world case studies, and leveraging technology to improve execution. Future research should investigate the long-term effects of such tasks on students higher-order thinking skills, adaptability, and preparedness for higher education and the workforce.

Academic achievement

collaborative learning

integrated performance tasks

interdisciplinary learning

sustainable development goals