When sharing gets out of hand in Primary School, what do you do?

You should talk to the teacher asap and have that little girl sat down and told she needs to stop being a piggy and eat her own lunch......sharing toys is one thing but the lunch you pay for and provide for your son is another story....if she doesn't like what her parents pack for her should not have to be your problem or your sons....poor kid :( I understand he is just trying to be nice and stay out of trouble but if you let the schools teach your son to be a push over he is going to be picked on all through school.....you should speak to your sons teacher first and the next day have your son put his foot down and tell her to eat her own food and if she tells on him the teacher will already know what is going on and let him know that he is not going to be punished! Good luck! Hope she backs off your little one and HIS lunch! :)