The main problem with declining performance in US schools is NOT the fault of the teachers. By and large, teachers are better qualified than ever, textbooks are better written, school libraries have lots more books, and pretty much every school and every student has access to the Internet.
The problem is that never before in the history of the planet has everyone had access to entertainment 24/7 via cable, dish or even network TV. This not only drains students' time, it prevents them from getting exercise as well as studying, and it also causes them to think that EVERYTHING they do should be entertaining. I think that, while learning vocabulary words in English or a foreign language can be sort of entertaining for some people, but not nearly as entertaining as watching teevee.
Now pretty much all kids have a cellphone, ostensibly to make them safer, but in reality,they use these to gossip with one another constantly about trivialities even more than they did when they had to wait to get home to chat on the phone.
The consumer society gives them tons to talk about: did you see him wearing FUBU? Doesn't he know that's for BLACK kids? Do you think he's turning into a wigger? Et cetera, et cetera, et cetera, blah blah blah. In the 1950's kids studied on the schoolbus. Now they chat on cellphones.
The consumer society may be good for business, but it sure as Hell is not good for producing children and adults who think for themselves, or even think at all.
Parents are also occupied with being entertained 24/7, and surely spend a lot less time helping kids with their homework than by father and mother helped me. We got our first TV when I was 13, but my sister and I were banned from watching it after 8:00 PM, and my parents watched it mostly on weekends,
I recall spending most of the day in the summers cycling around town with my friends and most of the evenings reading all sorts of stuff: all the Hardy Boys mysteries, most of the Nancy Drews, tons of comic books, the Book of Knowledge and even a couple of Victor Hugo novels translated into Spanish. This was after I liberated myself at the age of 13 from (ugh!) Vacation Bible School, an activity expressly invented to ruin kids' summers.
During the school year, I also spent a lot of time reading and riding around.
Many of my students at the University do not seem to have ever read a single bool for amusement. I am sure some have never read a book for any reason from cover to cover.
I suggest that this is NOT the fault of teachers or the NEA, and that those who think it is have their heads firmly lodged where the Sun don't shine.