$1:
“They have to know that six times four equals 24, but they also have to know why it equals 24, and why eight times three equals 24,” explains Henzel.
No they don't.
Some things just are.
I, like most of us, was drilled the times tables and other stuff when I was a kid.
It stuck, it's still there.
Thanks, o educational system, for actually teaching me something.

It's no wonder kid's scores go lower down the drain every year.