This book is about as extreme as you could get for an anti-standardized testing book, but kt may be what's needed.
Any brief (66 pages of prose plus another 40 in footnotes and sources) entry that attempts to argue against the main aspects of standardized testing will involve some generalities and simplifications. Indeed, Kohn does this quite often, and it's for this that I take off one star. Occasionally distracting, I would hate for this to be the only reading one does on standardized testing and for them to believe that they now understand it. Just one example: current norm-referenced standardized tests do not rank all of the students that take the tests against one another directly. Instead, they are ranked against a "norm", or a sample that establishes the percentiles for ranking students as they complete the tests.
Again, this does not undermine the powerful argument Kohn makes for eradicating standardized testing from education. Furthermore, this was a fun and engaging read. I also appreciated the solutions proposed by Kohn, even if some were too extreme for a young teacher in a profession that isn't exactly stable.
Quick read and worth your time to better understand just how problematic this issue is for our schools. Just know it's not quite the complete picture.