There are 3 levels:

Primary Years Programme (PYP): Ages 3-12. The inquiry based transdisciplinary coursework aims to build conceptual understanding in these children.

Middle Years Programme (MYP): Ages 11-16. The MYP program is a 5 year course  targeted for children between ages 11 and 16 to prepare them for the IB Diploma Programme. 

Diploma Programme (DP): 16-19. The Diploma Programme is a two year course for students of ages 16-19 that consists of 6 subject groups and the DP core components.