My 6 Year Old Being a Bully

Less than an hour ago I got a call from my 6 year old's first grade teacher about an incident she was involved in. On the playground, she and several other students were playing Duck, Duck, Goose. Apparently, her best friend was getting upset that my daughter (C), was not choosing her. The details in between are a little fuzzy, but C ended up getting upset and pulling friend's shorts down in front of the other students. C admits to this. The teacher also said C laughed at friend, but C denies it. So far we have taken electronics for I have no idea how long yet, and I stood over C while she wrote an apology note. We advised C that her friend may not want to be friends anymore after this, and she needs to understand that she was a bad friend and what she did was very wrong. C is moping around the house about her own feelings(she's 6, I'm not expecting altruism), and we remind her that actions have consequences, and she should be more worried about how her friend feels - likely sad and embarrassed.Her defense was that friend was saying the wrong thing for Duck, Duck, Goose and it was annoying. Obviously, not a great defense. We've had to direct her with how to be kind to friends, but it was mostly avoiding friends when they were being "annoying." We told her that being friends means being nice and sharing and not always expecting people to do what SHE wants to do. Trying to relate to her that she gets upset when they don't want to play with her, and she can't expect them to want to play if she's being mean.The teacher had to report the incident to the office, and they have to document the incident. I don't know what happens with the school from here. I might be getting a call tomorrow. How do we correct this behavior? Is cancelling Halloween for her too nuclear? How do we correct this behavior? I mean, we're totally open to being called shitty parents if that means there is a way to fix this behavior. I can give more information if it would be helpful. Just not sure what to do from here. Thanks for reading this. via /r/Parenting https://ift.tt/2oSw7s7