your poor little girl. What a horrid experience.
I disagree totally with the teacher's assesment that it was dealth with because if it had been properly dealt with they would be aware of how totally unacceptable such behaviour is. As a society, if we don't teach boys what kind of sexual behaviour is acceptable we're letting them and our daughters down. I think that for your daughter's sake and for their sake you should approach the principal and insist on stronger measures for innappropriate behaviour - you're doing them a favour in the long run by sending them a clear message.