True, but try to tell that to the millions of people who believe creationism IS science... To make it simple, just let the kids choose and decide for themselves...
No, that's not how it works. By that logic we also would have to teach about ghosts, dwarfs, <stroke>astronomy</stroke>astrology, or just claims made by other religions or folklore. There's a reason we teach our children sciences. They are objective, observable, testable, falsifiable, etc. We want a rational society, not despotism.
It is not science and it's not a question of beliefs.
You should not lie to kids. By telling them about creation in science classes, you lie to them.