The classrooms at John Endecott Memorial Academy are located along the interior side of the corridors and while some of them feature the same slippery lacquered floor as the corridors others instead have a restored wooden floor, part of a restoration project that was never fully completed before the school went public. The classrooms themselves have windows that look out into the corridors where light from the corridor windows filters in. Due to the original construction of the building, not all of the classrooms are a uniform size. But they are all close enough in shape to be useful for most regular classes.