The International Baccalaureate Diploma Programme (IBDP) is a two-year educational programme primarily aimed at 16-to-19-year-olds in 140 countries around the world. The programme provides an internationally accepted qualification for entry into higher education and is recognized by many universities worldwide. It was developed in the early-to-mid-1960s in Geneva, Switzerland, by a group of international educators. After a six-year pilot programme that ended in 1975, a bilingual diploma was established.

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The Moraitis School has been a recognized member of the IB since 1984 and since 1991 offers the full Diploma program as an alternative for students graduating from the 1st Lyceum-10th grade. Students from other schools are also admitted to section IB of the Moraitis School.