In simple terms
A friendly intro before the formal notes — no formulas yet.
From Object to Argument: Mastering the TOK Commentary
The TOK Exhibition commentary is your 950-word written argument explaining how your three chosen objects illuminate a specific knowledge question (your IA prompt). It is not simply a description of the objects; it is a focused justification of why they are relevant and what they reveal about the nature of knowledge.
Imagine you are a curator for a museum exhibition. You wouldn't just place an ancient coin in a case with a label that says 'Old Coin'. You would write a detailed placard explaining the coin's origin, what its imagery tells us about the values of the society that minted it, and why it is a crucial piece of evidence in this specific historical display. Your TOK commentary is that curator's placard for your three objects, explaining their significance in the context of your knowledge question.
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Deconstruct the IA Prompt: Before writing, break down your chosen prompt. Identify the key TOK concepts (e.g., 'truth', 'evidence', 'perspective') and the command terms. What is the central knowledge issue at stake?
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Contextualise and Justify: For each object, clearly identify it and its specific, real-world context. Then, write a focused paragraph explaining precisely how this object and its context demonstrate a key aspect of the IA prompt.
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Forge Explicit Links: Use clear and direct language to connect your analysis of the object back to the prompt. Use phrases like, 'This object demonstrates the challenge of...' or 'The significance of this object for the prompt is its ability to show...'. Do not make the examiner guess your connection.
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Review Against the Markband: Read your draft against the 'Excellent' (Level 5) descriptor in the assessment instrument. Is your argument 'convincing'? Is your justification 'well-supported'? Are your links 'explicit'? Revise until your commentary meets these high-level criteria.
Explore the concept
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Full topic notes
Formal explanation with the rigour you need for the exam.
Deconstructing the Assessment Instrument
The TOK Exhibition is marked against a single criterion, with five levels of performance. To score in the top band ('Excellent', 9-10 marks), your commentary must meet a specific set of descriptors. Understanding this language is the first step to success. An 'Excellent' exhibition presents a 'strong justification' for the inclusion of each object and makes 'clear' and 'explicit' links between the objects and the IA prompt. The argument must be 'convincing'. Let's break this down:
- Convincing: Your reasoning is persuasive because it is well-supported by specific details drawn from your objects and their real-world contexts. You are not making broad, unsupported claims.
- Well-supported: You refer to specific features of your objects to back up your points. You don't just say a map shows bias; you point to the exaggerated size of one country or the omission of another as evidence.
- Explicit: You state the connection to the prompt directly. You use phrases like, 'This demonstrates that...' or 'This links to the prompt's question about 'truth' by...'. You leave no room for ambiguity.
- Coherent: Your commentary reads as a single, unified piece of work. The points you make about each object contribute to an overall exploration of the prompt, rather than feeling like three separate, unrelated analyses.
An 'Excellent' commentary provides a strong and persuasive justification for why each object was chosen.
The links between your analysis of each object and the IA prompt must be stated explicitly and clearly.
Your arguments must be coherent, with each object's analysis contributing to a unified response.
All claims must be well-supported by specific evidence drawn from the objects and their real-world contexts.
Structuring Your 950-Word Commentary
A clear structure is essential for a coherent argument. While the IB does not mandate a single format, a structured approach ensures you cover all requirements for each object within the strict word limit. We strongly recommend dedicating a distinct section of your commentary to each of the three objects. This ensures balance and clarity for the examiner.
Introduction (approx. 50 words): State your full IA prompt. You may wish to briefly introduce your three objects and the main thread of your argument, but keep this section concise.
Object 1 (approx. 280 words): 1. Clearly identify the object and its specific real-world context. 2. Explain its connection to the IA prompt, making an explicit link. 3. Justify its inclusion by analysing what it reveals about the knowledge question.
Object 2 (approx. 280 words): Repeat the process. Aim to show how this object explores a different facet of the IA prompt or offers a contrasting perspective to the first object.
Object 3 (approx. 280 words): Repeat the process again, ensuring this object adds a new and distinct contribution to your overall argument. It might synthesise earlier points or introduce a final, complicating perspective.
Word Count Management: The 950-word limit is absolute. Examiners will not read beyond it. The structure above allocates roughly 280 words per object, plus a brief introduction, totalling 890 words, leaving a small buffer for flexibility. Be ruthless in your editing.
The Golden Thread: Making Explicit Links
The single most common weakness in TOK commentaries is the failure to make explicit links between the object and the prompt. Students often describe the object in detail and then assume the examiner will infer the connection. This is a critical error. You must act as the guide, constantly pointing out the relevance of your analysis. Weave a 'golden thread' from your object, through your analysis, and directly to the key terms of the IA prompt. Use signposting language to make this thread visible.
Apply the 'So What?' Test. After writing a sentence or two analysing your object, ask yourself: 'So what? How does this point relate to my IA prompt?' The answer to that question is the explicit link you need to write down. For example, 'This wear and tear on the map shows it was used daily. So what? This demonstrates that for its user, this knowledge was not static but was constantly being tested and updated against reality, linking to the prompt's question about the relationship between knowledge and experience.'
Grounding Your Argument in Specificity
A 'convincing' argument is built on specific evidence, not on vague generalisations. This is why your choice of object and your description of its 'real-world context' are so important. Avoid generic objects like 'a book' or 'a painting'. Instead, choose 'my father's heavily annotated copy of Sapiens' or 'a photograph of Banksy's Girl with Balloon I took myself before it was shredded'. The specific annotations, the personal connection, the specific location and time—these are the details that provide the raw material for a rich and convincing justification. The context gives your object a story, and that story is your evidence.
Worked examples
See the formulas applied — reveal one step at a time, like the exam.
IA Prompt: 'What challenges are raised by the dissemination of knowledge through the internet?' Object: A screenshot of a viral 'deepfake' video showing a well-known climate scientist seemingly recanting their life's work on climate change.
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This object is a screenshot of a 'deepfake' video that circulated on social media in 2023, depicting Dr. Evelyn Reed, a prominent climatologist, appearing to deny anthropogenic climate change. Its specific real-world context is crucial: it was not a real video but a sophisticated digital forgery created using artificial intelligence, designed to be disseminated rapidly across platforms like X (formerly Twitter) and TikTok. This object makes an explicit and powerful link to the IA prompt by embodying the profound challenge of 'epistemic trust' in the digital age. The internet's capacity for frictionless dissemination means that this fabricated knowledge claim can reach millions before any formal verification or retraction can take place. The challenge it raises is fundamental: how can we, as knowers, verify the authenticity of evidence when our own senses of sight and hearing can be so convincingly manipulated? The very authority of the expert, traditionally a cornerstone of knowledge in the human sciences, is undermined. This object is therefore justified in this exhibition as it demonstrates that the internet does not merely challenge the distribution of knowledge, but the very validation of it, forcing a re-evaluation of what constitutes reliable evidence.
IA Prompt: 'How can we know that current knowledge is an improvement upon past knowledge?' Object: A page from a 1950s British home economics textbook advising new mothers to add sugar to baby formula, placed alongside a current NHS digital pamphlet advising against any added sugars for infants.
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This object, a direct juxtaposition of past and present nutritional advice, provides a clear and convincing case for how we can know that current knowledge is an improvement. The 1956 textbook page, with its specific instruction to 'add a teaspoon of glucose to each feed to ensure robust growth', represents the accepted scientific knowledge of its time. Its real-world context is a post-war society that equated weight gain with health. The current NHS pamphlet, accessed via my GP's website, explicitly warns that added sugars can lead to obesity and tooth decay, reflecting a significant shift in medical understanding. This pairing allows us to justify the claim of 'improvement' by linking it to the methodology of the natural sciences. The change in advice is not arbitrary; it is the result of decades of empirical research, clinical trials, and peer-reviewed studies (a process of falsification of the old hypothesis). The 'improvement' is therefore knowable through measurable outcomes: lower rates of childhood obesity and dental caries in populations that follow the new advice. The object is justified because it makes the abstract concept of a 'paradigm shift' in scientific knowledge tangible and demonstrates that improvement is measured through better, evidence-based outcomes.
How it all connects
The big idea sits in the middle — tap a linked idea to explore the link.
Tap a linked idea to see how it connects back to the main topic — that connection is what examiners reward.
Glossary
Try to recall each definition before you reveal it.
Quick check
Answer in your head first — then tap to check. No pressure.
Revision flashcards
Flip the card. Test yourself before the exam.
Commentary
The 950-word written text that accompanies your three objects, in which you justify their inclusion and explain how they illuminate your chosen IA prompt.
Key takeaways
Review these before you close the topic — retrieval beats re-reading.
- ✓
An 'Excellent' commentary provides a strong and persuasive justification for why each object was chosen.
- ✓
The links between your analysis of each object and the IA prompt must be stated explicitly and clearly.
- ✓
Your arguments must be coherent, with each object's analysis contributing to a unified response.
- ✓
All claims must be well-supported by specific evidence drawn from the objects and their real-world contexts.
Practice — then mark it
The whole point: a real Cambridge question, marked mark-by-mark.
Test Your Commentary Writing Skills
Test Your Commentary Writing Skills
Extra simulations & links
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Frequently asked
Checkpoint
One marked question is worth ten re-reads — close the loop before you move on.
Reading it isn’t knowing it — prove it.
Before you move on: do Test Your Commentary Writing Skills on paper, snap a photo, and get examiner-style feedback on exactly where you win and lose marks.