Prepare learners for IB assessment. Fully updated to cover the revised syllabus for first examination 219, this comprehensive Study Guide reinforces the essential understanding learners need for IB exams. With an accessible format that clarifies and explains all the essential principles, this book supports maximum achievement in assessment. Achieve in IB assessment reinforce and master the essential understanding Fully grasp the key principles concise and focused approach simplifies complex ideas, building confident comprehension Fully matched to the revised syllabus first examined 219 with complete support for the internal and external assessmentsClear language optimally supports EAL learners