This includes working to translate text, teaching, as well as more. You don't do be so worried about the subject. This method of teaching incorporates immersing students in the objective (or second) language. http://irene.tmf-ev.de/web/vanthang/home/-/blogs/10-co-so-hoc-tieng-anh-giao-tiep-o-a-nang-uy-tin-nhat