I used to be  enterprising,and I used to be teach English in a middle school,I love my job,though I sometimes may complain about something,I just want to release pressure.I am in a suburban district,there are more teachers but fewer students,so every year  ten of us have to go to some village primary school to surport teaching,it's my turn this term,I am arranged to teach maths,I am not interested it,,and don't master it,I hate it,but I can't harm the students,so I must teach hard,but I can't find any pleasure in my teaching,what should I do?