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A complete guide to the IB Internal Assessment. Learn how to choose a topic, manage your timeline, and structure your IA for a top grade. Includes tips for parents.
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Alright, let's talk about the Internal Assessment, or the IA. It's easy to see it as just another thing on your IB to-do list, but trust me, that’s the wrong way to look at it. The IA is your secret weapon. It’s a project where you get to explore something you’re genuinely interested in, and it typically makes up 20-30% of your final grade in a subject. That’s a huge chunk of your score that you control, long before you even walk into an exam hall.
Think of it as your chance to show the IB what you can do on your own terms. Getting this right not only does massively boost your grade, but also builds the exact research and writing skills you’ll need to thrive at university.
So, what's the deal? An IA is a research project or investigation you complete for each of your subjects. Your teacher gives you the first mark, and then the IB swoops in to moderate those marks to make sure everyone's graded fairly across the globe. The format changes depending on the subject – it could be a lab report in Physics, a mathematical exploration in Maths, or a historical investigation in History.
The weighting of the IA is significant. A strong IA can be the difference between hitting your predicted grade or falling just short. Here’s a quick look at how much it’s worth in some popular subjects:
| Subject Group | Example Subject | Typical IA Weighting |
|---|---|---|
| Sciences | Biology, Chemistry, Physics | 20% |
| Mathematics | Maths AA & AI (SL & HL) | 20% |
| Individuals & Societies | History | 25% (SL), 20% (HL) |
| Individuals & Societies | Business Management | 25% (SL & HL) |
| Individuals & Societies | Economics | 30% (SL), 20% (HL) |
| Languages | Language A (Literature/Language & Literature) | 20% (HL Oral), 30% (SL Oral) |
This is the most important step, and honestly, it can be the most fun. Choosing a topic you’re genuinely curious about will make the 20-40 hours of work feel less like a chore and more like a passion project.
The IA isn't a one-weekend task. It’s a marathon, not a sprint. Breaking it down into phases makes it manageable and helps you avoid that dreaded last-minute panic.
Focus: Brainstorming, topic selection, and preliminary research.
Goal: Finalize your research question and get it approved by your teacher. Start gathering your key sources or planning your experiment. You should aim to have a clear plan of action before DP2 starts.
Focus: Conducting your research/experiment and writing the full first draft.
Goal: Get a complete draft done for your teacher to review. Don't aim for perfection; aim for completion. This is the version your teacher can give you feedback on, so make it count.
Focus: Acting on your teacher's feedback, editing, and polishing.
Goal: Revise your IA based on the feedback. Check it against the IB marking criteria one last time. Proofread for grammar and spelling, fix your citations, and submit your final version to your school's internal deadline.
Focus: Your school handles this part! No need to worry then.
Goal: Your school will upload your IA to the IB around March/September. Samples of IAs from your class will be moderated by an external examiner to ensure marking is fair and consistent with IB standards. The number of chosen samples depends on the number of students in your class - the larger it is, the greater the number of samples that is moderated externally.
Your support is invaluable during the IA process, but it's a fine line to walk. The goal is to be a guide, not the project manager. Here’s how you can help effectively:

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