Doesn't suit? No problem! You can return within 30 days
You won't go wrong with a gift voucher. The gift recipient can choose anything from our offer.
30-day return policy
Formula is the flexible, unique and enjoyable route to Cambridge exam success. Formula takes a fresh approach to topics, units and components to create an exam-focused package whatever the teaching and learning scenario. Its truly flexible learning materials are designed to work independently for short and intensive preparation or in combination for longer exam courses.