The problem isn't just confined to USA. Here in NZ there was research published that showed one quater of the population believed the earth was created in six days. Trouble is, it's part of our cultural background. There are also many people making a lot of money from pushing the ID or creationist barrow. Sure it's about education but you can't make people learn something they don't wish to. I teach guitar and most young people are at least keen to learn that but even so the same problem occurs.