Subjects like math are not impinged upon American kids because it is boring. Boring as hell. The problem is the way we teach kids.
Rote memorization is crappy old nonsense, which most schools still employ. But kids today have too many distractions now to learn by that method. Used to be that to solve certain math problems, you had to know those multiply tables. These days? Give the kids a calculator, or cell phone with a calculator in it, and all is well. They pass. So long as you allow cell/smartphones in a classroom, there is no learning. Why? Because it is all looked up on the Interwebs.