Introduction to English as a Second Language Teacher's Book is part of the series of resources which bring students to a level where they are ready to study Cambridge IGCSE® or equivalent courses. The series is written by an experienced ESL teacher and trainer. This Teacher's Book accompanies the Introduction to English as a Second Language Coursebook and Workbook. The book includes answers to all of the exercises in the Coursebook, Top Tips to help teachers with the course, and Differentiated Activities to stretch able students while supporting those that need more help.