I think part of the reason I think so harshly about how low test scores and stuff are in the US right now is because of the school I went to....my high school was really good, there were tons of kids taking and passing AP tests, my class set a record for highest ACT average in the school's history (something like a 25 average), and of 303 kids in my class, we had a 99% graduation rate -- something that is unheard of in the US, especially for a public high school.
And I think that No Child Left Behind policy is what is destroying lots of schools....also, the fact that many public schools in the US are drastically underfunded and therefore can't afford to offer harder courses.