Big Books are a fl exible resource that can be used throughout the course. They can be used to present the topic, reinforce concepts or to close a unit. We suggest you use them with the CD to help with pronunciation and intonation. Each level has two Big Books. Big Books are designed to present linguistic resources and contents of the program in a natural way. Besides using them in the planned sessions, you may use them whenever you need an additional activity or for additional practice, especially if students like the text.