It had two buildings. Is that difficult to understand or what? Historically they were separate schools built close together. (Probably a boys and girls school but I don’t remember)
Each had a main part that was a single corridor on 4 floors with classrooms off it. There were extra bits that weren’t part of the main corridor, too, which weren’t as tall, and the main part also wasn’t all classrooms; in one building the bottom floor was, I think, just toilets and changing rooms, then admin offices, and only then were there classrooms, but I can’t remember for sure. In the other building there were 3 complete floors of classrooms and I think one half floor, with the rest of the bottommost floor occupied by a gym.