My students progressed with AQA English Language B A2 Students' book.  It has a brief summary of what the student needs to develop the two pieces of course work, and the exact approach for the exam. Along with other recommended texts my student did exceptionally well and do call on this text to structure your lessons and keep everything to the point and succinct.  From West London English and Media teacher, English and Media tutor in Harrow, London.  http://paltip.com/westlondonenglish/!4kmk