“Our adult children in their late 40s-50s. Learned this in elementary school.”
Interesting. I’m 63, so would have been only a few years ahead of your eldest, but we were never taught that in school.
It’s a simple thing, though, and does make sense. I suppose the practice has spread over the last 40 years.
At one time many ofour Californicator public schools were often excellent schools before they became diversified and PCed.
Our adult children learned things that they used everyday olr at least often in real life.