The iogeneration project intends to quantify iodine levels in school-aged children (6-12 years old) and to find a correlation between iodine levels and markers of cognitive development and thyroid health. This project also aims to explore the potential impact of iodized salt usage in meal preparation at school canteens and at home. In this study we collaborate with several schools form the North of Portugal with the involvement of Direção Geral da Educação (DGE).