The Skyline Resource Books are designed to accompany each of the five levels of Skyline. Each level is directly linked to the grammar in the Stundent's Book.The Grammar Resource Books provide teachers with photocopiable pages of exercises that affer further practice of the grammar presentend in Skyline. The exercises cover the points in the Grammar Builders in each unit of the Stundent's Book and enable teachers to improve their student's grammar with additional practice.