My daughter is in Y1. She's a free reader, and knows all her phonics. The teacher was doing phonics with them yesterday firing questions at the class, and DD told me that she knew all the answers and got in there first, and so she was told to not answer any more so the others could have a go.
This is perfectly fine/normal, isn't it? Obviously the others need to get a chance to guess. I'm guessing it wasn't a "hands up" type of Q/A session as I know DD well enough that she wouldn't want to break the "rules" of calling out an answer unless she was asked to (if you see what I mean) so I'm guessing it was more of a quick fire thing. At school, at least, she does what she is told 
But at the back of my mind are semi-repressed memories of being told similar and me feeling awful and ending up afraid to contribute to class again as like DD is, I was pretty sensitive over stuff like that, hence my paranoia.
I don't know how else the teacher could deal with it though?