The fourth edition of the bestselling Cambridge English: Advanced (CAE) course has been updated to prepare for the revised 2015 exam. This Teacher's Guide includes lesson notes, an answer key, and background information corresponding to the 25 units of the Objective Advanced Fourth Edition Textbook. The Teacher's Resource CD-ROM provides 12 progress tests and unit-by-unit vocabulary lists, both with and without definitions. Extensive Cambridge English: Advanced practice tests are available online.