Those who would like to read how this all came about, can find John Taylor Gatto's book free online at that link above. "The Underground History of American Education."
This is more than a book about "who done it and how," there are plenty of useful ideas and inspiring bits of knowledge.
As for tests, there's a PDF floating around the 'Net of a test taken by an eighth grade boy in the early 1950s. Subject: structure of constitutional government. I don't think we have any Senators that could even pass it today, but that 50's kid got 98%.
As for Uny's test, at least a couple of the questions are almost "no brainers," iff'n you know that 1 US bushel = 1.24445608 cubic feet. Can we round that up to 1.25?