Is There A Standard English Grammar?

So many Englishes!
What should we teach our students?
(PDF Format)

The English language has spread far and wide across the globe. It is the first language of millions of people worldwide and millions more speak English as a second or foreign language. It is so widespread that many refer to it as the International language. So whose language is it? Whose English do we teach foreign students. Yours? Mine? Someone else's. Is there a standard English? How do we recognise it? Do we all agree that this is the standard? Which English should we teach? In this book, Stuart Kelly may have an answer.