I am a teacher and can tell you firsthand how stressful field trips can be. .Sure, they are a lot of fun- but I ALWAYS fear I will be leaving someone behind. I can't tell you how many times I do a head count while on a field trip. It is very irresponsible of those teachers, and there is NO excuse. I can't even imagine how angry and upset I would be at those teachers if that happened to my child!