I found this podcast from this 
post:
I subbed today for a 7th and 8th grade teacher. I’m not exaggerating when I say at least 50% of the students were at a 2nd grade reading level. The students were to spend the class time filling out an “all about me” worksheet, what’s your name, favorite color, favorite food etc. I was asked 20 times today “what is this word?”. Movie. Excited. Trait. “How do I spell race car driver?”
I've only listened to one episode so far, but it's really well produced, seems well-researched and very well put together.
From what I gather so far, the ways that the American public school system "teaches" kids how to read is not only completely wrong, but actually saddles them bad habits which fundamentally hinder their reading comprehension.
A huge swath of American adults are functionally illiterate, and I think I'm starting to understand why.
I think adult illiteracy is pretty high in the U.S. as well. I have had multiple middle managers who cannot write a coherent paragraph to save their lives, to the degree that I have had to go literally ask them what they mean because otherwise it would be reading tea leaves.
Even worse is people who are lifer manual laborers, they can be very smart and great with their hands, but ask them to read something above very basic text and their eyes just glaze over. Something has gone seriously wrong here.
79% of American adults are literate. When I learned that recently I thought that had to be some kind of mistake. It can't be that fucking low, right? But it is.