I wish there was a book too. There's so many variables to learning English, access to T.V, computers, to native speakers. Problem for Thailand is so few are taught phonics and therefore can't read their textbooks. For me reading and the skills are the first and most important thing. simple speaking comes at the same time. Next comes verbs, verbs and more verbs followed by the ability to ask questions. Totally depends on your students but for me if they can't read at matayom level, you have to go back and teach them. There are no short cuts.