Hogwarts is not the only wizarding school , Bouboutin for example , is explicitly mentioned , and as we know from the Cursed Child , there ' s also a school in America . I assume that there are schools in every major geographical region . Also , I ' ve literally been rereading the books over the past couple weeks and I don ' t see anywhere that it explicitly says that his class is only around 40 students . I always assumed is that there are far more students that are not explicitly described in the books just like in any TV show or movie about high school , it only follows the main characters with the occasional interactions with side characters . But in the background you see lots of other students bustling around .