I find that it's not so much that the kids learn about it FROM school (teachers, etc) but rather AT school from other kids. That is why I now make a point to talk to my kids (11, 9 and 7) about current events, so that I can control the message somewhat. Plus, more than once I've been in the car and flipped on the traffic report, only to be a minute early or late for the traffic and hear about the current event of the day instead. Having recognized that I can't shield them completely, I've decided to address is directly myself. I do try to shield them from horrible photos and alway talk about the Fred Rogers message -- always look for the helpers, there are always helpers there.