Our students finished their year by visiting a university. I found an empty classroom and asked them to enter and take a seat. The room seated 175 students in an elevated theater setting. At the front was a low stage with a demonstration table. They saw by the periodic table on one wall that this was a chemistry class, but not one like ours back at school.
I asked them if they thought the professor would come to your desk if you needed help. They realized that it was logistically impossible. “So how would you get help?” I asked.