I remember back in the ‘70s I took a class in the so-called New Math.
Set theory and a bunch of other nonsense. It never made sense to me.
Commie Core sounds like the same thing.
Except set theory actually has real-world applications. This garbage? Not so much.
I had "new math" in the 70's as well. Finally, in my senior year of high school, I had a teacher that wouldn't put up with bull crap math. He was a pistol. He would rant and rave about how none of us (students) could do math. I swear he was pissed off 90% of the time. But he taught us math, algebra and trig in one school year. It really turned the light on for me and by the time I graduated college I had a minor in mathematics.
I have since help home school my children. Math is not difficult and it is not difficult to teach when approached pragmatically. Kids only need to learn and master 22-26 new things in a school year if you look at the breakdown of a real curriculum. My one daughter is a sophomore and is doing Calc I & II this year ... and she is no math wiz, but she gets it.