Sure, If you are asked by your Headmistress to do so. But you can’t claimed any financial benefit for this reason in future. This is an opportunities to remain in practice, culture and curriculum on the course of class XI and XII. It will help you for the preparation of next higher scale by the SSC. Thank you.
It a matter of relation between you and your H.M. You may deny to take classes of higher secondary level. But,if it is found that there is not enough subject teachers,then you are requested by her or the M.C. of your school to take the allotted classes on your subject. In view of an ideal teacher,it will be not good to refuse it. It is also depends on your mental and physic health/ability. After all you are not bound to take the classes of XI-XII.
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.