A common curriculum model applies to all the Diploma Programme group 4 subjects: biology, chemistry, and physics. A core of material is studied by both higher level and standard level students in all subjects, and this is supplemented by the study of options. Higher level students also study additional higher level (AHL) material. Higher level students and SL students both study two options. There are three kinds of options: those specific to SL students, those specific to HL students and those which can be taken by both SL and HL students. Higher level students are required to spend 60 hours, and SL students 40 hours, on practical/investigative work. This includes 10 to 15 hours for the group 4 project.
IA assessment quide
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