MATHractive aims to reduce math learning losses among 8th-grade students using Project-Based Learning (PBL). The project will develop 6 interactive PBL math modules, integrate them into a digital learning platform, and train teachers in partner schools. By combining innovative teaching methods, digital tools, and interdisciplinary learning, MATHractive will increase student engagement, improve problem-solving skills, and ensure long-term adoption of PBL in European education.