Dear T. Cherry , Pukwan complains you a lots about imposing penalty for who speak Thai in the class. But you don't worry because I agree with your idea. By the way , in order to motivate her or other students , I would like to suggest you to give a score for who speaks English in the class. Who gets a maximum scores will receive a reword. I can help you about a reword.
It's a joke for me. Today she take many dictionary to school such as Talking dictionary, English dictionary, Chinese dictionary haha.