Once upon a time, I remember hearing people talk about how the United States of America would be on the metric system someday. It seems like that day may never come, at least not in my lifetime. However if the powers that decide these things really want to make the switch, there is a way to acclimate the majority of the country in about four months time.
Massive campaigns spending money on educational programs would not be needed. It is simple really. It's football. Change all the football fields from yards to meters. That is it. Starting with pee wee football teams all the way on up to the NFL. In one season, most everyone would completely understand meters. Well maybe it isn't that simple. You need to get buy in from a lot of people ahead of time. Perhaps we just need to remind the team owners it is for the greater good of the country and they will go down in history as visionaries.
And if you are thinking that this only helps us understand distance not volume, I think the beverage companies of the world are already on that. Companies like Coca-Cola and Pepsi have already made sure people know what two liters look like. They are doing a pretty good conversion with half liters too, after all charging about the same amount for 16.9 ounces instead of 20 ounces is a pretty solid profit move.
So who's in? Are you ready for some football? Hmmm... maybe I should grab a couple of pints first.