Understanding and Using English Grammar - Serie de libros del tercer nivel de English grammar by Betty Azar

Understanding and Using English Grammar is a developmental skills text for intermediate to advanced students of English as a second or foreign language. While focusing on grammar, it promotes the development of all language skills in a variety of ways. It functions principally as a classroom teaching text but also serves as a comprehensive reference text for students.

Archivo RAR contiene: Workbook, Student Book, Teacher´s Guide, & PPS presentation. 

http://www.megaupload.com/?d=LDRWQ145