The International Baccalaureate Organization (IBO), more commonly known as the International Baccalaureate (IB), is a nonprofit foundation headquartered in Geneva, Switzerland and founded in 1968. It offers four educational programmes: the IB Diploma Programme and the IB Career-related Programme for students aged 16 to 19, the IB Middle Years Programme for students aged 12 to 16, and the IB Primary Years Programme for children aged 3 to 12. To teach these programmes, schools must be authorized by the International Baccalaureate.