I don’t think air conditioning was invented when I went to school.
And that potted meat with a heavy smear of mustard should not be forgotten(thanks for the reminder Greymo).
Every kid in school use to trade lunches but I always ate mine as packed.
I can never remember cafeterias in schools.
We use to sit on wooden benches in the basement and play knives. That is where a jack knife is opened partially and flipped.
The winner was the one that got most the fingers under the handle when the tip was sticking in the bench. We would play for treats in a lunch bag, cookies, candy, etc.
Try taking a knife to school now and there would be a lockdown.