The Workbook features a learner training component to help students reflect on their learning and develop study techniques; activities to practise grammar, vocabulary and functional language; reading and listening texts to expose students to a variety of genres, topics and styles; and activities to help develop students' pronunciation.
There are mistakes in the answer key to activities in the student's book and a missing activity in the pre-intermediate workbook. Grr. They should hire better proofreaders! I think Headway's activities are more interesting.