>fourth grade
Whats that in metric? hhh Yea, same here or there abouts. Except, when I first learned about metric, temp. was referred to as 'Centigrade' instead of Celsius. Old text books. Took me years to get the memo.
>converting
I remember a guy who bought a Ford Mustang II. His complaint, in his words, was the car was half metric and half 'American', so you had to have two sets of wrenches and sockets out and he was always grabbing the wrong one. If that was true, that half-half stuff didn't help with public acceptance. I'm guessing today all American cars (since the demise of AMC who were still using stuff from the old Rambler parts bin until the end,) are all metric.
>speed limit signs
Distance signs too on the Interstate Hwy's. For awhile you would see signs to the next big city in both miles and kilometers. Never took and after 20 years of weathering the signs didn't get replaced.
I can see why Americans never took to a foreign measurement like metric, during the 1980's and 90's people were all terrified that black United Nations helicopters filled with foreigners were going to appear and declare parts of American soil World Heritage Sites.
