The Programme for International Student Assessment (PISA) is an international study that evaluates the educational systems of countries by testing the skills and knowledge of 15-year-old students. Conducted every three years by the Organisation for Economic Co-operation and Development (OECD), PISA assesses students in reading, mathematics, and science to provide insights into how well they are prepared for real-life challenges. PISA aims to measure not just what students know, but how well they can apply their knowledge in practical situations. The results help policymakers and educators identify strengths and weaknesses in their education systems, guiding improvements and reforms to enhance student learning outcomes.