I would say for me, it was a classroom with curtain walls! It was during my student teaching many years ago. Charts and posters were put on the curtains. There was a chalkboard on wheels. Bookshelvels also made part of the walls. Occassionally, the lights would go off in part of the room because somebody needed to use the overhead projector. You could also sneak into 3 other classrooms without using the hallway.:lol: I'm surprised how noise didn't affect the student too much. Taking a test was a challenge because you could hear the lower grades skip counting in unison sometimes.