Denis McCarthy was accused of victimising a student from an ethnic minority background by making him read out a poem about a gay monkey every week for a year, the hearing was told on Monday.
A teacher who is accused of inappropriate behaviour, including sexual assaulting a pupil, began giving his testimony this week at a professional conduct panel.
Knitted and crocheted poppies have brought Tring together, with more than 200 people getting involved as well as a host of local groups and businesses.