"Skills Booster is a four-level series specially written to teach and develop young learners' listening, speaking and writing skills. While the series has been designed to be compatible with any course book of a similar level, it may also be used on its own. The task types presented are closely linked to the Cambridge ESOL examinations from Young Learners English Tests (Starters, Movers, Flyers) at beginner and elementary level to KET and PET at pre-intermediate and intermediate level."