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The Ultimate Guide to Nailing Your IB Internal Assessment (IA)

The Ultimate Guide to Nailing Your IB Internal Assessment (IA)

5 min read | Manmohini Tiwari | April 13, 2025

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.

The Ultimate Guide to Nailing Your IB Internal Assessment (IA)

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 massively boosts your grade but also builds the exact research and writing skills you’ll need to thrive at university.

Part 1: The IA - What It Is and Why It Matters

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 GroupExample SubjectTypical IA Weighting
SciencesBiology, Chemistry, Physics20%
MathematicsMaths AA & AI (SL & HL)20%
Individuals & SocietiesHistory25% (SL), 20% (HL)
Individuals & SocietiesBusiness Management25% (SL & HL)
Individuals & SocietiesEconomics30% (SL), 20% (HL)
LanguagesLanguage A (Literature/Lang & Lit)20% (HL Oral)
The Lanterna Tip: Don't treat the IA as a box-ticking exercise. See it as an opportunity. Acing your IA means you walk into your final exams with a solid 20-30% of your grade already secured. It’s a massive confidence booster.

Part 2: Choosing Your Topic (Without Losing Your Mind)

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.

  • Start with Your Interests: What part of the syllabus actually made you think, \"Huh, that's cool\"? Start there. Your personal engagement and enthusiasm (or lack thereof) will shine through in your writing.
  • Narrow Your Focus: A common mistake is choosing a topic that's way too broad. \"Climate Change\" is not an IA topic. \"The effect of rising soil salinity on the germination rate of Phaseolus vulgaris (dwarf beans)\" is. Your goal is to find a research question that is specific enough to be answered thoroughly within the word count.
  • Do a Feasibility Check: Before you commit, ask yourself the tough questions. Do you have access to the data, equipment, and sources you need? Can you realistically collect enough information for a proper analysis? For science, does your school lab have what you need? For history, are there enough primary sources available?
  • Talk to Your Teacher: Your teacher is your greatest resource. Bounce ideas off them early. They’ve seen hundreds of IAs and can quickly tell you if your idea has potential or if it's a dead end.

Part 3: The IA Timeline – Your Roadmap to Success

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.

Phase 1: Foundation (End of DP1 / Summer)

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.

Phase 2: The First Draft (Mid-DP2, ~Nov-Dec)

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.

Phase 3: Refinement & Submission (Late DP2, ~Jan-Feb)

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.

Phase 4: Moderation (The Final Step)

Focus: Your school handles this part!

Goal: Your school will upload your IA to the IB around March/September. A sample of IAs from your class will be moderated by an external examiner to ensure marking is fair and consistent with IB standards.

The Lanterna Tip: Use a calendar and work backwards from your final deadline. Set mini-deadlines for each stage: \"Finalise RQ by July 1st,\" \"Complete data collection by October 15th,\" \"First draft finished by December 1st.\" This turns a huge project into small, achievable steps.

Part 4: A Quick Word for Parents

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:

  1. Create the Right Environment: A quiet, dedicated workspace can make a world of difference for focus.
  2. Help with Time, Not Content: You can help your child map out a timeline and check in on their progress against their own deadlines, but the research and writing must be theirs alone.
  3. Be a Sounding Board: Sometimes, just talking through an idea or a frustration can help unblock a student's thinking. Listen, ask questions, but don't give answers.
  4. Encourage Teacher Communication: Remind your child that their teacher is their primary source of academic guidance. The IB has strict rules about how much help they can give, so it's crucial your child uses that support wisely.
  5. Prioritize Well-being: The IA period can be stressful. Ensure they are getting enough sleep, eating well, and taking breaks. A burnt-out student can't produce their best work.
Manmohini Tiwari
Manmohini Tiwari
Hi, I’m Manmohini, an IB graduate with 40 points, now studying International Relations and Global Affairs in Italy. I earned 7s in HL History and HL English A, along with an A in TOK, and I’ve been tutoring these subjects for around four years. My experience working with organisations like NATO and the United Nations has deepened my understanding of global issues — something I love bringing into my lessons to make learning more relevant and thought-provoking. I focus on helping students see connections between ideas, develop strong essay and critical thinking skills, and approach the IB with confidence and curiosity rather than stress. My lessons are interactive and tailored to each student’s goals, whether that’s improving analysis, refining writing, or mastering exam techniques. I see tutoring as more than academics — it’s about building perspective and empowering students to express themselves clearly while staying balanced.. When I’m not tutoring, you’ll usually find me hiking, playing new music, or planning my next travel adventure.

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The IB Internal Assessment (IA) is a major project completed for each IB subject, such as a lab report in sciences or a mathematical exploration in maths. It's crucial because it typically accounts for 20-30% of your final grade in that subject, allowing you to secure marks before the final exams and develop key university-level research skills.

The most common mistake is choosing a topic that's too broad. This leads to a superficial analysis that can't score well. Your research question needs to be focused and manageable. Our expert tutors, who are top IB graduates, can help you brainstorm and refine a specific, high-scoring topic during one-on-one sessions.

Ideally, you should start brainstorming topics towards the end of your first year (DP1) and begin drafting during the summer. This prevents a last-minute rush in DP2 when you're also managing exam revision, your EE, and TOK. A free Lanterna consultation can help you create a strategic timeline for all your IB deadlines.

Absolutely. While school teachers provide essential guidance, they often have limited time. A Lanterna tutor can provide detailed, one-on-one feedback on your IA draft, focusing on structure, analysis, evaluation, and how to precisely meet the IB marking criteria to boost your score.

Lanterna’s IB consultation is a free 20–30 minute call with a Student Success Expert. We discuss your IB journey, challenges with things like IAs, and your goals. You'll receive a personalised plan with clear next steps to improve your grades and confidence.

Yes, it is completely free and there is absolutely no obligation to purchase tutoring afterwards. The goal of the call is to provide you and your family with clarity and a strategic plan to succeed in the IB. It's our way of helping you find the right path forward.

Our Student Success Experts are IB specialists who have advised hundreds of students and parents globally. They are not tutors, but strategic advisors who use the free consultation to understand your specific needs, create a tailored study plan, and explain how Lanterna's support can help you achieve your academic goals.

This is a very common challenge. First, revisit the official IB assessment criteria for your subject to ensure you're addressing every point. If you need more personalised support, a Lanterna tutor can help you outline your IA logically and deepen your analysis to meet the requirements for the highest marks.

Your role is to be a facilitator. You can help by creating a quiet workspace, assisting with time management, and acting as a sounding board for their ideas. For subject-specific academic guidance, an expert Lanterna tutor can provide the support needed while ensuring the work remains the student's own.

Yes, we have expert tutors across a wide range of IB subjects at both Standard and Higher Level. They are all high-achieving IB graduates who are deeply familiar with the unique IA requirements for their subjects, whether it's a Science investigation, a History essay, or a Maths exploration.


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