"using a nonstandard system of measurements."
The British, for example, still use their imperial measurements as well as the metric system. I don't get why people get pissy about the US still using ours.
Despite what many people think, US schools DO teach the metric system, and it IS used. We learn it before, or at least during, middle school (unless it's a bad school district--oh hey, THERE'S something legitimate to pick at!). It's used for science and engineering, usually.