In Sync is an exciting, innovative, easy-to-use four-level course that reflects the lives and experiences of teenagers. In Sync stimulates learning and broadens students'''''''' horizons through lessons that engage both intellectually and emotionally. Th e course includes the red filter, a unique learning tool that can be used to facilitate mastery of key grammar points. Features: Brings language learning to life with up-to-date topics and real-life teenage issues, problem-solving puzzles, and realis tic communication activities Enables students to succeed through achievable and motivating lessons, extra practice in the Student Book, and mixed-ability exercises in the Language Builder.