Students earn an IB Diploma after passing exams and completing the program requirements. They have to take classes in 6 subject areas. This is more than most countries.
The six subject areas are: Language 1(first language), Language 2(second language), Math, Science, World Studies, and Electives. History, Literature, Geography and Economics are all World Studies subjects.
Students also have to write a long paper called an 'Extended Essay' and take a philosophy class called 'Theory of Knowledge'.
IBDP is famous as a difficult school program because the program has many subjects. Students have to do to 3 Higher Level subjects and 3 Standard Level subjects. Higher Level subjects are longer and more complex.
IB is studied in most countries but some study the IB differently.