Most of mine I got through observation as a kid, reaching full
  maturity as a young teenager - I think I was taking a first aid
  test after some training. There was nothing confusing about it.
  Straight forward. No trick questions. "Can't be this easy" I
  remember thinking. "Where's the trick?" and that's when it
  clicked in that THIS was the right way to give tests. Thing is,
  I'm good at tests. Always did really well at them. I learned how
  they go at a young age and worked around their little mazes. But
  I felt bad. I felt back for the more normal people. I knew I
  wasn't normal - normal for me of course but I felt bad for those
  who sweated, struggled, crammed for tests - and the whole thing
  was ridiculous to me. That's probably why I picked up
  Unschooling, "Why johnny can't read", Summerhill and books like
  that in the Roselle Park library, probably in the 8tth grade,
  just before vail-deane.... I never knew what inspired me to pick
  up those books, but I remember being so annoyed for friends that
  went crazy over test-days. Such an eye opener to see I wasn't
  the only one that thought it was ridiculous. I only learned
  about the "grit" angle recently. I suspected it but it's when I
  saw a book that was very influential a few years ago (I have the
  title somewhere) among teachers that I saw what the newer issue
  is: it justified the confusion. Justified the process. Made it
  perfectly ok to run kids through the meat-grinder. They already
  did it - back when we went to school. But this book made it ok.
  I didn't read it so my knowledge is limited to the positive
  reviews it got from teachers and educators... but I can see its
  influence in the way that common core implementation took place.
  In theory common core is good: Standards. But the implemention
  is horrible. Thankfully, Obama cancelled the "No child left
  behind" thing from Bush, which Common Core was riding on... so
  now states are going to regain tremendous control now. No longer
  is teacher pay going to be tied to student performance. So, I
  expect better thing coming Fingers crossed.