Im intersted in starting to offer private lessons here in Bangkok and I was wonderig if anyone could suggest any books (or series of books i guess) I could use. Obviously Im interested in some material that would cover all levels of english, from very beginner to advanced...
also, I imagine Ill need some kind of test to give to my future students to be able to assess their eglish level. If you know any test that I could buy, or perhaps download your suggestion would be greatly appreciated.
thx in advance,