Just like the battle against "common core" in the US. Especially the math piece
As years of a nationwide decline in math abilities stoked fear in educators, a more successful way of teaching math spread across the country. Then, parents started to notice it wasn't how they were taught, so it's bad because change is bad. "Math is math" and if I don't get it, how could my child?
God forbid your child be smarter than you.
In red states, a pledge to dismantle common core was the rallying cry of many candidates, and they won. In my state, all we had to do was change the name of common core to something else, and everyone who was angry was suddenly appeased, because they were morons. All they did was add cursive to the curriculum and everyone was like, "yeah, now we're old school" and left it alone.
Special love and shout out to parents who went the extra mile and learned the stuff to help their child, especially if stuck with a set-in-their-ways shitty math teacher who refused to learn it themselves and couldn't teach it.
Both of my children are now better than me at math. Like comically better.