Starting with the basics and gradually progressing to a more advanced level, each section lets learners assess their current level of knowledge and progress further until they have the skills they need to pass the exam. We've also provided a checklist before each exercise or set of exercises indicating which skills you need to complete the task. Allows students to assess their current level of knowledge. Each exercise or set of exercises indicates exactly what skills are needed. The exercises are progressive, letting candidates work through them at their own pace.