Hello, Madam, Why are you mentioning youself as a student? You are a teacher. If you think yourself as an ideal teacher, then you may take the classes. Though it is not mandatory. But why are you thinking that your H.M. is forcing you to take classes? It may happen that your H.M. is depending on you. She is giving you more respect. Are you taking classes more than 25 per week? Then you may deny. Otherwise you may take classes in H.S. level. Be cool. What are your students saying. If they accept you as an good teacher, then please don’t deny. Don’t mind. Thanks.