CORSO DI INGLESE livello B1:

Headway Digital Gold B1 (Fourth edition) 
Student's book, Workbook and new eBook 
(John & Liz Soars) 
ISBN 978-0-19-471960-5
Oxford University Press 

CORSO DI INGLESE livello B2:

Complete First (second edition) 
Student's book with answers with CD-ROM 
(Guy Brook-Hart) 
ISBN 9781107698352
Cambridge University Press 

CORSO DI INGLESE livello C1:

Complete Advanced (second edition)
Student's book with answers with CD-ROM 
(Guy Brook-Hart, Simon Haines) 
ISBN 9781107670907 
Cambridge University Press