Developed in collaboration with the International Baccalaureate Organization, Oxford's Course Companions provide extra support for students taking IB Diploma Programme courses. They present a whole-course approach with a wide range of resources, and encourage a deep understanding of each subject by making connections to wider issues and providing opportunites for critical thinking. It has been written by a principal examiner for the IB Diploma Program Chemistry and has been extensively reviewed by teachers, consultants and the IBO. With material integrated to include international and historical perspectives, students are encouraged to think critically and make connections to other subjects and to world issues. Includes material for cross curricular connections to help students think critically about science and consider its evolution, full coverage of the core and AHL as well as selective coverage of the Options, provides a wealth of illustrations to help explain difficult concepts, material for CAS and the extended essay as well as examination questions included for critical thinking, examination practice and reinforcement of concepts learned.