Here’s my five cents:

  It’s the damn phone.

In Finland in 2016 (Nr. 1 in the early 2000’s) there was a reform towards what I believe is called constructivism in pedagogy, ie. kids learn by themselves and the teacher simply facilitates learning, there should be play and games as way to learn etc. There’s no evidence any of this works, but you don’t need as many teachers nor as qualified, so that’s good right? Besides, their new iPads will this them. This is an Apple/Google/whatever school now. Who needs text books?

I think we simply threw a generation of kids under the buss to sell each other toys and dumb software and to keep bunch of VC’s in San Fran happy. Education started to decline, because as a society we stopped caring about education.