General English courses are based on the popular Headway series, by Oxford University Press.
Headway is an excellent course in general English, with levels from Beginner to Advanced. It gives effective practice in all the four skills of listening, speaking, reading and writing. The courses use both printed and audio materials.
In addition to the coursebook, Headway also has a workbook, which students can use to get practice in the topics discussed in the classes.
The Headway course is a respected and very widely used course in English as a foreign language. It is published in the UK by Oxford University Press (OUP).
There is a Headway coursebook for students at every level of study of English: