Consider yourself lucky. Remember when we tried to convert completely to metric in our school systems here in the US? It was called "New Math". Forget that the rest of entire world had been on the metric system. Anyway, it was a disaster. The teachers didn't even know how to teach it and the attempt only lasted a couple of years before we just gave up.

It's funny, anyone that knows what "new math" is here I can automatically guess their age within a few years.