I think that may be a teacher by teacher type thing. I went to a public school. I definitely remember something that stood out: The teacher instructed everyone

I think that may be a teacher by teacher type thing. I went to a public school. I definitely remember something that stood out: The teacher instructed everyone to move all the desks to the perimeter of the classroom. Then had everyone lie down and pretend their hands and legs were bound together. Pictures of boats like this were also in the text books. Similar classes where we discussed in detail the wars against native americans... now, that all being said, this was in the Silicon Valley (before it was called that collectively). So I can't exactly describe public schools in say, Kansas.