The Teacher's Book contains:



Unit-by-unit teaching notes with audio scripts and answer keys
Interleaved with Students' Book pages
Workbook audio scripts
Workbook answer key
Teacher's DVD-ROM

Class audio in MP3 with audio script gives you:



Video resources: all Students' Book videos with subtitles which can be switched on and off
Teacher's resources, including instructions and answer key (these are the same resources as in the Printed Resource Books)
Workbook audio in MP3 with audio scripts
Exam Practice Books audio in MP3, with audio scripts and answer keys