I am on my second teaching placement and still getting name prenounciations of pupils wrong. I'm getting pupils calling out corrections of names in an innapropriate way (esp years 7 and 9). In some cases I can apologise to the individual, get them to correct it and explain I'm still learning a lot of names. In others the whole class starts commenting and repeating the mispronounciation as a joke against that pupil. I don't want to make a huge deal of it but I am having to stop the lesson, call for silence, wait, and chastise individuals for calling out. There must be an effective line that would kill this off more effectively. Any ideas? Does anyone have a quick, clear response for dealing with this?