One of my very favorite bloggers, Tammy at Forever in First, is having a Linky Party of classroom mantras. I'm not sure if my kiddos would come up with other things that I always say but I certainly say each of the following several times a day.
I teach preschool and I am the best swing pusher. The kiddos in my class usually remember to say "May I please have a push?" but I still say this several times a day to the younger kids.
I say this when a kid shares something they have accomplished. For example, "Look, I just tied my own shoe." A long time ago I read that it helps a child to value intrinsic motivation if we say "You must feel proud." rather than "I'm so proud of you." I like the idea of helping kids recognize that they don't need adult validation to feel good about themselves.
I often say this to my class when they do something well. Either I will be "shocked and amazed" or we will share something we are learning with a visitor to "shock and amaze" him or her or I will tell the kids that their parents will be "shocked and amazed" by what the kids are working on. When we wrote our class book about a visiting leprechaun, the kids insisted that the leprechaun would be "shocked and amazed!"
I just started saying this after Tammy blogged about it. My kiddos really seemed to "get it" when I said this when they were tattling.
I know this doesn't really make sense but it seems to help my little ones not blurt out what they are thinking. We "think inside our own brains of something we are thankful for" during our moment of silence before snack and other times when I want the kids to quietly think about something. I always let the kids share what they were thinking about later.
I like this so much better than repeatedly saying "be quite." I try to say it once and then quietly wait for the kids to get their coats and line up. I can now just stand at the front of the line and they know it won't move until the line is quiet and everyone is looking at me.
I could probably go on and on but I want to read what other teachers say everyday:)