Ok, we get it, union teachers. You suck at math, so you concocted a way to teach something you aren’t strong at. Nevermind, this entire system thinks you don’t know implicitly what 7 plus 7 is, but by gawd, you reliably know that 3 plus 4 equals 7! And that of course, you’re supposed to choose 3 plus 4 so you can add the 3 to the 7 to get 10!
In review, 7 plus 7 hard, but knowing 7 plus 3 is easy. Oh, and 3 plus 4 was easy too.
You're shooting at the wrong target here. The huge majority of teachers hate this stuff. It's not they way they were taught, and it's not an efficient way to learn in the first place.
Quick story. A friend of mine is an elementary school teacher. You would not believe the way she must teach the kids how to multiply. It's a twisted and convoluted method.
Like most of us, my friend believes that there are certain facts that you just must know. Like 4x6=24. So she passed out a multiplication table to the class.
The next day the principal told her to take back every last multiplication table. And she was told that if she did that again, she would be fired.