St Michael's has 2 buildings, the Main Building with 3 floors and the New Building with 4 Floors.
All classrooms have their room number on them above the door.
The room number tells you which building and floor each room is in.
G = Ground Floor
F = First Floor
S = Second Floor
T = Third Floor
N = New Building
F04 = The main building, first floor, room number 4
NT10 = The new building, third floor, room number 10