"Have you kids learned that not everything you are taught in school is the truth?"

Jeez Bill, they're 5th graders, most of them will figure it out as they continue their education.  

They'll learn to think on their own.  

They'll learn that scientific theory evolves.  

They'll learn that they've evolved, and as a species will continue to do so. 

And bill, the few that don't figure it out will become "sheeple" for you or others to lead into ignorance.