If there is anything that kids need to learn, whether or not they are ever going to own a gun, and regardless of the political views of their family, is that "the gun is always loaded." Even a kid from a non-gun owning family may at some point (perhaps at a friend's house) encounter a gun, and it is vitally important, to prevent accidents, that everyone know that one little fact. I'd like them to know how to put a safety on too, honestly.
No, I don't think the school should teach kids how to use a gun, but all to often, kids and guns are a taboo subject, as is pointed out. Yet one of the continual things we hear about guns is the tragic reports of kids who shot themselves or a friend because they treated a gun like a toy. And since many families don't talk about guns (either because they don't think about them at all or because they hate them so much its like some families talking about sex), I have no problem with a segment addressing the bare basics of gun safety. As I said before, things like "this is a safety, this is how you put it on" "the gun is always loaded, and the safety is always off, even if you just put it on" and "a gun is not a toy, and you should never touch one without permission, and an adult supervising, etc."
Now, if they were actually teaching my kid to use a gun, yeah, I'd object, because I think that's something the family needs to decide. I wouldn't mind a kid of mine using a gun, but I'll pick who teaches them, thanks. However, if this is rural Wyoming, it may be that no parents object.
P.S. You'd probably just hire a teacher for this segment . . . say a certified gun safety instructor. I have trouble imagining that you could screw up such basic rules too much.
P.P.S. Note, however, that I am a fanatic for the principle of "the gun is always loaded and the safety off" and think its right up there with basic life skills as "Never eat at a place called Mom's, never play cards with a guy named Doc, and NEVER sleep with anyone crazier than yourself."