The first think to do is evaluate the student English level.
Them, determine how fast want to learn.

I suggest people to prepare a own English dictionary (in Excel) where the student include the known words, and learned words (Register writing, sound and meaning) class by class. With this, the students can appreciate the fist sight their advance; study and remember all of them. I can teach MS Excel and Word too. I do not use an specific text book. I can use the books the student have.

I start to teach the words (things, names, verbs, articles) the people need to interact with other people in different sceneries. Them, teach articles, verbs, pronouns, adverbs.