That is entirely up to the management. Certain schools permit the storing of equipment, while other schools do not. That is something you must ask the management. However, according to the licence, students are permitted to store them at school to prevent needless carrying and tool damage. But there are physical limitations. Do your research before making a purchase decision. Additionally, carrying them to class every week will not be simple for the class of 9. Thus it would be wiser to purchase smaller equipment they can store on the school’s property.