Too true, especially in math & science; my children have foreign teachers for those subjects because the American teachers don’t know them (even for elementary school). My favorite story was an American teacher who described adding fractions as adding the numerators and then the denominators; 1/2 + 1/2 = 2/4 (which is still 1/2).
She was a BIG fan of CC and we had some pretty heated battles that were sparked by merely asking why this versus how you learned etc.and being told how stupid I was for not Gettin IT
NPD came out and ALL who doubt the Majesty and splendor of CC are just ignorant peasants, me included..
Very very little hyperbole in my post, the Edutocracy is a clanny bunch...