Since this seems to only have happened once, I don't think I'd think twice about it. I'm guessing that this was a one-time thing that happened when your dd brought whatever it was to class that she wasn't supposed to, and that if it was an ongoing issue the teacher would have contacted you at some point.

Re your question, yes, my kids teachers do grade on behavior and I don't see an issue with it. If there was an ongoing issue and I felt the teacher was misinterpreting my child's actions I'd meet with the teacher to discuss what was up.

polarbear