Try ordering a 113.3981-grammer burger at your local McDonald’s or Burger King. And then don’t be surprised when they don’t understand your order! That’s because the United States has not yet fully adopted the metric system. As a result, most U.S. citizens are not familiar with it ... The post Why the U.S. Isn’t On the Metric System appeared first on PEimpact - Recognizing the impact of PEs.