So I have a pretty regular sub who normally takes my jobs. She stayed in for me yesterday, and when I got back today, they had told me that she had told one of my students to shut up. The entire class said they witnessed it. And worse, this isn't the first time. They had her a while back near the beginning of the year and the same thing happened then. That time I just kind of told them, that regardless of what she said, they should still respond to her with respect because she is the teacher in the room (there was one kid that got upset about it and was rude back to her). Since it happened again, I'm wondering what to do. Yesterday, a lot of the teachers were out and we couldn't find a sub for some of them to attend a district PD, and apart from this, I have no reason to believe that she is not a good sub. I would like to find a way to show kids that I'm taking their trust in telling me this seriously and that I'm looking for a solution, but I still want to keep the sub in the future. Is there any way to kindly let her know that telling my kids to shut up is not the way I normally do things and that they get very offended at it without offending the sub?