I have a co teacher who is generally very sweet and good to me, but she sometimes undermines me and its a bit annoying. For example, the other day she told me to prepare some quizzes for the students and told me how many quizzes she needed. I did it and then when I tried to get the students desks in order to take the quiz she says " The students can just do it together. This quiz isn't really important " She said that directly in front of the students. If the quiz isn't important and they are allowed to copy then why do the quiz? And even if it's not important she should lead the students to think they are so that they will focus more.

Another time I was going to teach the kids and then she just jumps in and decides to play them a movie instead. She sometimes will go up to the children that I placed at the back of the room for time out and engage with them and coddle them. She will also joke with the kids or talk with some of them while I'm trying desperately to get them to look at me and pay attention to the directions. The other day I was trying to explain something to her and she kind of snatched the paper out of my hands because she was frustrated. (It wasn't super aggressive but I felt it was a bit borderline ) . I get along very well with her at other times though. She is actually really sweet, but at times it seems like she has no manners. What would you guys do in this situation?

Another time I was going to teach the kids and then she just jumps in and decides to play them a movie instead. She sometimes will go up to the children that I placed at the back of the room for time out and engage with them and coddle them. She will also joke with the kids or talk with some of them while I'm trying desperately to get them to look at me and pay attention to the directions. The other day I was trying to explain something to her and she kind of snatched the paper out of my hands because she was frustrated. (It wasn't super aggressive but I felt it was a bit borderline ) . I get along very well with her at other times though. She is actually really sweet, but at times it seems like she has no manners. What would you guys do in this situation?