This was disappointingly a waste of my money. The exercises in the third edition teacher's book do not coincide with those of the third edition of the student's book. They are numbered differntly and or they are not the same exercises. And being that the listening exercises are not tapescripted in the student's book, one would hope to find the tapecript at least in the teacher's book. But that is not the case. Thus one would ask: what am I to do with the nearly £15 book? It's quite embarrassing in front of your students to not be able to carry on an exercise. At this point it becomes a waste of money also for the students.