Estoril, Portugal - November 27 - On November 27, Salesian students from Estoril took part in the world's largest chemistry class. They joined another 1,440 boys from 17 schools in Cascais. Accompanied by teachers and managers, the pupils carried out an acid-based experiment and managed to fire a rocket. The experience was promoted by "Science4you" and will be included in the Guinness Book of Records. For the 59 students and teachers of the Salesians of Estoril it was a new, different and satisfying challenge.