Michael Stubbs 
Language, Schools and Classrooms (RLE Edu L Sociology of Education) [PDF ebook] 

The role of language is central in education – but there is much debate about the exact relation between children’s language and their educational success. The author provides a clear guide to the basic issues in the debates over language deficit, standard English and classroom language, and in this edition he shows how work in sociolinguistics can give a better understanding of the place of language in education and society.