Introduction to English as a Second Language Workbook accompanies the
Coursebook (sold separately) in this Fourth edition series, and is
presented in an accessible updated design. Each Workbook unit reinforces
the topic and theme from the corresponding Coursebook unit, and provides
additional practice in reading, writing and listening. Furthermore, each
Workbook unit starts with a review of key vocabulary from the
corresponding Coursebook unit, and contains a specific language focus.