I went to a similar looking middle school, but each grade was in one giant room probably the size of a gym. No class had an actual wall unless it was on the edge. Probably 10-11 classes in each big room for the grade. The only dividers between classes were like rolling bulletin boards and maybe a metal cabinet or two. I couldn’t imagine having to teach in those conditions because it always was pretty noisy.

I also remember the school’s gym had a full locker room with showers but students weren’t allowed to use the showers and none of the bathrooms in the school had stall doors. And the stalls were those short ones were your head was higher than the top of the wall. It was super weird.