It depends on the area. If it's a rougher part of the city, I would prevent the elementary shooting. They would have no idea what to do. My high school had a school shooting, and it was a quick in and out thing since it was gang activity. It wasn't a nice area. Not to mention if it was a serious shooting, some of those kids are probably crazy enough to try to beat the -blam!-ers. Or shoot them, since there's probably a few that carry a gun to school. Otherwise, I would pick the high school since they are more populated. They also have a little more to live for since they understand the world more.