I did Jeremy Kyle lol... Was a while ago but we looked at how he treated people differently based on who they were. His tone and language, he was very casual towards his guests and almost hostile to the "villain". However, he addressd the crowd in a formal manner.
This relates to school, you don't speak to your teachers like you do to your peers. Tone as well as choice of vocabulary is different. Do people talk to girls differently, if so why? Relate this back to the question and context, you are in a school. Look at how emotions affects tone and language in both boys and girls. Does ethnicity and race play a role?
Hope this somewhat helps.