So I have been starting to get a lot more into photography and I'm testing out a Smugmug Pro account right now. I would like to start making prints available for purchase, but I'm not sure on the legality. I'm in High School and most of my shots are of High School events; such as plays, sports games, and various other events. I've read about a model agreements here on the forums. Will I need one? My market isn't really going to be newspapers or anything but just the people involved in that activity. (Lead Actor, Linemen on the Football Team) Any help would be greatly appreciated. Thanks!