IBO (International Baccalaureate Organization) World Schools offer one of the IBO-accredited programs. In order to offer one or more of the International Baccalaureate (IB) programs of education, schools must complete an authorization process. Once they have been authorized, they are known as IB World Schools.
The process may include the different age levels that the IB covers: PYP, MYP, Diploma Programme (DP) and the Career-related Programme (CP).
For more information: http://www.ibo.org/