I think you should give a therapist a try and if you have a considerate teacher I think it's time you gave him/her a call about it , talked about this issue privately with him/her, invited him/her home to cooperate with you to tackle this problem about being teased at by your own father but I am just offering my advices and I am not suffering from being teased at by my father so maybe my advices are sorta unrealistic and delusions.