We usually recommend one set per class, so that students have access to the complete set of narrative words and can therefore make the most out of the programme. However, it is a flexible programme and it can slot into the curriculum whichever way suits you best. The word list and materials are extensive; some schools have been using it as a central resource across year groups or classes.
Another popular option is buying dictionaries for the class. Please contact us here regarding bundle price: firstname.lastname@example.org