Greetings @marcosmilano71, it is good to know that this kind of "belonging" or "attachment" also happens in your country. In our country, we call it "Brigada Eskwela" (School Brigade). Brigada Eskwela usually starts one week before classes start. In Brigada Eskwela all the entities of the school and the students' parents come together on a specific date to clean and repair the whole of the campus (which is always fun since we have the opportunity of bonding with our child's school teachers). Brigada Eskwela is not mandatory, it is because of the "belonging" and "attachment" why we come together as one for the benefit of the school and the students.