Each day I take a group of Firsties to my room for a small group reading time.  On the third day this conversation takes place:
First grade boy #1: Guys, she's not a real teacher.
At first, I don't register what he is saying.  Then--
First grade boy #2: Yeah.  She's just a helper.
Me: No. This is my classroom.  I teach first grade. 
They begin to argue with me.  More kids join the conversation.
First grade girl #1: No. She's just a helper.  She's not a real teacher.
Me: I AM A REAL TEACHER.  This is my room we are in right now.  Remember on the first day of school when the teachers stood in front of the whole first grade? I was up there with the other teachers.  
First grade girl #2: No.  I don't remember you.  Sorry. 
Me:  I am at recess with you everyday.  Don't you see me out there?
First grade girl #1: Lady, I am too busy playing to be looking for you.
Tomorrow will be better.  Just sayin'.