Usually, there's another place you could just as easily quote out of context and be completely contradictory. I haven't looked at it, but I can't imagine it being anything other than utter quackery. Most of the best part of elementary school is being taught things that you don't already know and aren't in much of a position to verify. I think evolution falls here. It's pretty much impossible for a 10 year old to come up with or verify evolution, but it's probably satisfying to a lot of 10 year olds to have this very cool way of looking at and trying to understand the things they find in a park or see in that gift subscription of Owl or National Geographic.
Time is short in the elementary school classroom and it's standard practice to state without proof.
I couldn't verify the speed of light but that didn't mean it wasn't an important part of my childhood. I'm an engineer now, and although as of two months ago we stopped occupying any kind of important position in society, I still think it's a lot of fun. It's elementary school science in practice. So, rather than saving any discussion of life for when students are mature enough to handle the debate, I'd much prefer to know that caterpillars are green and hard to see because if they weren't they'd be dead meat and that somehow something called evolution made this all possible than not know anything at all and be unsure whether or not trees being created on the fourth or fifth day but definitely before caterpillars was somehow important.