What is the IB (International Baccalaureate) and how does it work?

Parents hear a lot about the International Baccalaureate (IB), but it is not always obvious how the IB Diploma Programme, the wider IB curriculum and university entry all fit together. In this guide, we explain clearly what the IB is, how the Diploma Programme works for students aged 16–19, how subjects and assessment are organised, and why universities worldwide value it so highly – from the perspective of a parent who needs structure, data and no surprises.