The School Campus is divided into 4 different areas.
The first is the Dormitories. Fully equipped with stocked food, running water, etc. As well as several facilities for the care of the Pokemon, including a healing machine and other services. Dorms are organized into blocks and each room given a number. Blocks range A through F, and numbers up to 50, housing two people each, or being solo by special request. Faculty members reside in Dorms G, H, and I, with some enhanced features and a different location.
The Primary School Building is the bread and butter, here you'll find every single classroom, the gym, the labs, and the faculty offices, and plenty of other things. The main building is fairly large, but not enough to get lost in. Unless you are a poor navigator. Classes can be held anywhere from large lecture halls to smaller classrooms, depending on the course, class size, and teacher preference. The main school building also has a Pokemon Mart branch at the front. Stocked with the highest quality items. For those able to pay of course.
The Nature Reserves are one of the attractions to attending this school though. Two of the largest completely wild areas in Orre. Both house entire ecosystems of Pokemon from every single region, free to be interacted with, or caught by students or faculty. Or perhaps merely as a training area? All are correct answers. The two environments are the Mountain Range (which also features a dense network of caves) and the Forest. Those wishing to acquire distinctly aquatic Pokemon may travel to the docks some ways away from the landlocked School and try their luck there.
The final building is the Pokemon Gym. Built on student request, it is a full featured Gym, but not a licensed part of any league. Instead, Leadership changes around King of the Hill style. Whoever holds it must accept any challenge, and upon a loss, forfeit position as leader.
The gym is also used for general casual or competitive battling, and can simulate nearly any environment.