Complete writing guide
Theory of Knowledge essay guide
Written and cross-checked by IB Diploma graduates: Alexander (41), Alejandro (40), Martina (40), Victoria (38), Martin (35), Maria (34)
· Checked against official IB guidance · Editorial policy
The TOK essay is a 1,600-word maximum response to one of six prescribed titles for the correct examination session. It is externally assessed out of 10 and contributes 67% of the final TOK mark; the exhibition contributes the remaining 33%. The overall TOK grade combines with the Extended Essay grade in the Diploma core points matrix.
Looking for the May 2027 prescribed titles?
The exact May 2027 wording, required Areas of Knowledge, common traps, and title-by-title analysis are collected in the dedicated session guide.
See all six May 2027 TOK essay titles →Areas of Knowledge
Your essay must engage with at least two AOKs. Each AOK provides a different lens for examining how knowledge is produced, validated, and disputed.
Mark band descriptors
These iBacalao band summaries are provided as a study aid. The current official assessment instrument is holistic, so use the IB examiner instructions as the authority rather than treating this section as a checklist.
The essay has a superficial exploration of the prescribed title. There is little or no use of areas of knowledge and/or optional themes. Little or no consideration of different perspectives is present. Examples are not used or are irrelevant. The essay demonstrates little understanding of the nature of knowledge. The essay lacks clarity and/or coherence.
The essay has a limited exploration of the prescribed title. There is a basic use of areas of knowledge and/or optional themes, but this is not clearly relevant to the prescribed title or does not demonstrate understanding. Little consideration of different perspectives is present. Examples are used sparingly or their relevance to the prescribed title is not clear. The essay demonstrates limited understanding of the nature of knowledge. The essay may lack clarity and/or coherence in places.
The essay has a satisfactory exploration of the prescribed title, though this may not be fully developed. Areas of knowledge and/or optional themes are used, though not always in a way that is clearly relevant to the prescribed title. Some consideration of different perspectives is present. Examples are used, though their relevance may not always be clear. The essay demonstrates some understanding of the nature of knowledge. The essay is sometimes clear and coherent.
The essay has a well-developed exploration of the prescribed title. Areas of knowledge and/or optional themes are used in a way that is relevant to the prescribed title. Different perspectives are considered. Examples are used effectively, and their relevance is mostly clear. The essay demonstrates a good understanding of the nature of knowledge and links to the core theme and/or optional themes are present. The essay is mostly clear and coherent.
The essay has a sustained, well-developed and effective exploration of the prescribed title. Areas of knowledge and/or optional themes are used in a way that is clearly relevant to the prescribed title. Different perspectives are considered and evaluated. Examples are used consistently and effectively, and their relevance is clear. The essay demonstrates sophisticated understanding of the nature of knowledge and links to the core theme and/or optional themes are explicit and well-chosen. The essay is clear and coherent throughout.
How to write a strong TOK essay
Use a prescribed title from the correct session
The essay must respond to one of the six titles prescribed for your examination session. Confirm the exact title and session with your school before drafting; the 2026 examiner instructions explicitly treat a response to the wrong session's title as outside the valid task.
Unpack the title without losing focus
Clarify the key terms and assumptions that affect your interpretation, but keep every definition tied to the prescribed title. The current assessment is holistic: definitions matter only when they help build a clear, coherent and critical exploration of the title.
Build a sustained line of argument
In 1600 words, each argument, example, analysis and evaluation needs to contribute to answering the prescribed title. Current examiner guidance rewards a discussion that stays focused rather than a sequence of disconnected claims and counterclaims.
Explore two Areas of Knowledge
Current examiner instructions require exploration of two Areas of Knowledge selected from the five in the course: History, Human Sciences, Natural Sciences, Mathematics, The Arts. The important question is not whether an example belongs to an AOK, but what it shows about the nature, production or justification of knowledge in that area.
Support arguments with specific examples and consider implications
Use examples because they do analytical work: they should support an argument and stay linked to the title and the chosen Area of Knowledge. Stronger responses also consider what follows from an argument rather than stopping after the example is described.
Evaluate different points of view
The current assessment instrument explicitly looks for awareness and evaluation of different points of view. A conclusion should therefore reflect the argument you actually developed, including qualifications or limits that emerged from comparing perspectives, rather than simply repeating the introduction.
Common questions
How long is the TOK essay?
The maximum length is 1,600 words. The current 2026 examiner instructions confirm the 1,600-word maximum.
How many prescribed titles are there for TOK?
Under the current TOK course, the IB issues six prescribed titles for each examination session. Students respond to one title from the correct session.
How many Areas of Knowledge does the TOK essay use?
The current 2026 examiner instructions state that all prescribed titles require exploration of two Areas of Knowledge selected from the five in the guide. Some titles specify one or both directly.
How is the TOK essay marked?
The essay is externally assessed out of 10 using a holistic assessment instrument. Current examiner instructions focus on sustained engagement with the title, effective links to Areas of Knowledge, supported arguments, implications, and awareness and evaluation of different points of view.
How much of the TOK grade is the essay?
The current examiner instructions state that the essay contributes 67% of the final TOK mark. The exhibition makes up the remaining 33%. The overall TOK grade then combines with the Extended Essay grade in the Diploma core points matrix.
Sources & verification
Primary-source references used to verify key assessment facts on this page. Last source check: September 22, 2026.
The 2026 examiner instructions are the primary public source used for the assessment facts above. Prescribed-title wording remains session-specific; use your school's official copy for the exact title you submit.
- IB — TOK examiner instructions 2026Primary current source for the essay task, 1,600-word maximum, two-AOK requirement, 10-mark holistic instrument and 67% essay weighting.
- IB — Theory of knowledgeOfficial course overview confirming the exhibition and 1,600-word essay as the two TOK assessment components.
- IB — TOK example essaysOfficial public page confirming that students choose one title from six and that the title set changes by examination session.
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