Common Core is now up to the states and is losing its grip. It was one of those “good in theory” rushed in too quickly without thought, too federally dominant, and they incorporated the “GRIT” BS that was (maybe still is) popular in “education psychology” circles.
Grit means: Encourage everyone to fail so nobody gets cocky. Not that schools haven’t been already doing that for decades but this makes it ‘ok’.
The push by Microsoft to get their tablets in schools to replace Apple’s dominance seemed to partially work though.
Right now, school sare stuck with CC textbooks/materials. I suspect next years purchases will see more rational state programs in place in most states but some will stick to it.
What I told my nephew (now 12) when he was in 4th/5th grade dealing with it in Florida was: Do the math in your head he way you’re USED to. Put down the answer. THEN do the “show your work” in the way the teacher wants to see it.
It worked. He’ been “doing it twice” ever since.