The I National Competition of Crystallization in the School (http://www.lec.csic.es/concurso/) is a contest on crystallography and crystallization for young pupils that has been carried out among 20 secondary schools across 7 provinces (Granada, Cadiz and Malaga, Gerona, Oviedo, Murcia and Zaragoza) of 5 different regions (Andalusia, Catalonia, Asturias, Murcia and Aragon) throughout Spain.