New Math, that must be it. :^)
Our kids were in grammar school in the 70’s when they came out with the first new math fiasco, there was no way I could help them.
Thank heavens it didn’t last long.
I have a grandson contending with the common core crap. My daughter has to get on the internet to research how to help him and she was a math wizard in school.
We are “educating” generations of illiterate ignorants.