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Learn how to choose your IB Group 4 Subject. Expert advice on subject selection, assessment breakdown, and the Group 4 project (including IA details).

Group 4 subjects, often referred to as the ‘experimental sciences’ in the IB curriculum, are designed to equip you with the knowledge and critical thinking skills to understand the world around us.
The great thing about Group 4 is the variety of options available. While traditionally associated with the sciences, they also encompass more technical courses. This means you have a wide selection, including:
When selecting a Group 4 subject, consider these key factors:
Are you fascinated by forces and nuclear power, ionic bonding and the periodic table, or the human body and the effects of exercise? The breadth of Group 4 subjects ensures there’s something to spark everyone’s interest.
If you have a clear idea of your university path, let that guide your choice. For aspiring doctors, Biology and Chemistry are often essential. If you aim for a career in technology, Computer Science could be a strong choice.
Group 4 subjects are challenging but rewarding. It’s wise to choose a subject where you feel you have a solid foundation, rather than simply following what your friends are taking.
While specific assessment methods vary by subject, there are commonalities across Group 4. Subjects are assessed through both internal assessment (IA) and external examinations. Typically, all students cover a ‘core’ curriculum, with HL students undertaking additional modules. There are also optional topics that contribute to a separate exam paper.
Don't worry about the famed Group 4 project! It's simply a collaborative investigation you undertake, and the mark contributes to your internal assessment. It's a small percentage of your overall grade but offers a refreshing change from standard lab work. If you choose to study two sciences, you only need to complete one Group 4 project.

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