I second this. If kids already get information about driving safety and regulations at school, it wouldn't be a bad idea that they get the same about firearms, but you'll have to deal with anti-gun parents, then.
IMHO, some training is needed to handle firearms and it makes sense to make it mandatory.
Students are not required to take Driver's Ed in school, nor do I think firearms safety training should be mandatory. If you're going to go that route, there are a lot of things that kill a lot more kids every year than firearms, so the mandatory training time would be better spent there (if it were to be spent at all, which I don't agree with).