To choose a strong IB Extended Essay topic, start by selecting a subject you study at HL or SL that genuinely interests you. Your topic must be specific enough to develop a focused, assessable research question within 4,000 words, yet broad enough to sustain approximately 40 hours of independent research. The most effective approach is to move from a general area of interest to a precise research question through discussion with your supervisor and a review of your subject’s EE conventions. |
The Extended Essay is a mandatory core requirement of the IB Diploma Programme — completed alongside Theory of Knowledge (TOK) and Creativity, Activity, Service (CAS). At a maximum of 4,000 words and approximately 40 hours of independent research, it represents one of the most substantial pieces of academic writing you will produce during your IB years. Through the EE and TOK matrix, a strong Extended Essay can contribute up to 3 bonus points towards your IB Diploma total.
Topic selection is the single decision that determines what your Extended Essay can become. Choose the right topic, and every subsequent stage — research question formulation, methodology, analysis, reflection — has a clear foundation to build on. Choose a topic that is too broad, too narrow, or misaligned with your subject’s conventions, and no amount of strong writing will compensate for that foundational weakness
At IB Innovators, our certified IB examiners have worked with students at exactly this moment — the moment of topic selection — and understand what makes a topic viable from an examiner’s perspective. This guide offers an examiner-informed framework, organised by subject group, so you can approach this decision with confidence.
What Is the Extended Essay and Why Does Topic Selection Matter?
The Extended Essay is an independently researched academic paper — one of the three mandatory core requirements of the IB Diploma Programme. It is assessed against five rubric criteria worth a combined total of 34 marks. The five criteria are: Criterion A (Focus and Method), Criterion B (Knowledge and Understanding), Criterion C (Critical Thinking), Criterion D (Presentation), and Criterion E (Engagement). These criteria feed into the combined EE and TOK matrix, which awards up to 3 bonus points towards the IB Diploma total.
Your Extended Essay is marked first by your school supervisor and then reviewed by an external IB examiner during the moderation process. Understanding what the external examiner looks for — and how topic selection directly affects their assessment — is what distinguishes strategic EE preparation from simply choosing a subject you enjoy.
Why topic selection is so consequential: Criterion A (Focus and Method) is the first criterion the examiner evaluates. It assesses whether your research question is appropriately focused and whether your methodology is suited to addressing it. A poorly scoped topic produces a vague research question — and that limits Criterion A marks before you have written a single word of analysis. A well-chosen topic creates a natural framework for strong performance across all five criteria.
We understand that topic selection can feel daunting. You are committing to 40 hours of independent research on the basis of a decision made, often, before significant research has been done. The structured approach in this guide is designed to make that process manageable — by giving you clear criteria to evaluate any topic before you commit.
Topic vs Research Question – Understanding the Difference
One of the most common and consequential misunderstandings in EE preparation is treating topic and research question as the same thing. They are not — and understanding the difference is the essential first step towards a focused, high-scoring Extended Essay.
Your topic is the broad subject area you are investigating — your starting point. It identifies the general domain of interest without yet specifying what your investigation will find or answer.
Your research question is the precise, focused, assessable question your Extended Essay must answer — your destination. It specifies what you are investigating, how you are approaching it, and what kind of answer is possible.
Topic: The effect of temperature on enzyme activity in Biology Research question: To what extent does temperature affect the rate of amylase activity at temperatures between 20°C and 60°C in vitro?
Topic: Government economic policy in the United Kingdom Research question: To what extent did the Bank of England’s quantitative easing programme between 2009 and 2012 achieve its stated macroeconomic objectives? |
Notice that in both cases, the research question specifies a measurable variable or evaluative angle, a defined context or condition, and a testable scope. It is not an open-ended exploration — it is a focused question the investigation will systematically address.
Criterion A (Focus and Method) directly rewards this specificity. Examiners assess whether the research question is focused and whether the essay addresses it consistently. A topic that has not been refined into a precise research question produces an investigation that wanders — covering the topic broadly rather than addressing a specific question rigorously. This is a common early indicator of a weak Criterion A score, and it begins at the topic selection stage, not the writing stage.
The research question format matters. ‘To what extent does X affect Y in the context of Z?’ and ‘How does X influence Y under conditions A and B?’ are assessable question formats. ‘An investigation into X’ is a topic description — not a research question — and it limits Criterion A marks from the outset.
What Makes a Strong IB Extended Essay Topic?
Before exploring subject-specific guidance, every prospective EE topic should be evaluated against five criteria. A topic that satisfies all five creates the conditions for a strong Extended Essay. A topic that fails even one will create difficulties that follow throughout the investigation.
1. The Topic Must Be Researchable Within 4,000 Words
The 4,000-word limit is not simply a formatting constraint — it is an investigative constraint. Your topic must be specific enough that you can address it completely and rigorously within 4,000 words. If you cannot answer your research question thoroughly within this limit, your topic is too broad.
Strong: Investigating how a specific business framework informs the market expansion strategy of a named company in a defined period. This is specific, bounded, and fully researchable within 4,000 words.
Weak: ‘How do global fashion brands use marketing strategies?’ This is far too broad — it could fill a textbook, not an Extended Essay.
Examiner tip: Outline what your investigation must cover to answer the research question completely. If that outline requires more than 4,000 words of substantive content, narrow the scope: restrict to a specific time period, geography, company, species, phenomenon, or set of conditions.
2. The Topic Must Allow You to Formulate a Focused Research Question
A strong topic naturally generates a research question that is specific, focused, and assessable. If you cannot formulate a clear research question from your topic within a few minutes, the topic itself is likely too vague or too broad.
The research question should be a genuine question that your investigation can answer — not a statement of intent, not a description of a topic area, and not a question so open-ended that any answer would qualify.
3. The Topic Must Align With Subject-Specific Conventions
Every IB Diploma Programme subject has established conventions for how Extended Essays in that subject are approached — what methodology is expected, what sources are appropriate, and what analytical framework the examiner applies. A topic that does not align with its subject’s conventions puts the student at a disadvantage in Criterion B (Knowledge and Understanding) and Criterion C (Critical Thinking).
Sciences EEs are typically expected to involve experimental data. A Sciences EE based entirely on secondary sources requires careful justification and may limit what Criterion A (methodology) can demonstrate.
Humanities and Social Sciences EEs draw on primary and secondary sources appropriate to the discipline — economic data, historical documents, psychological research, or textual analysis, depending on the subject.
Mathematics EEs require genuine mathematical exploration — the student must engage with the mathematics themselves, not simply survey an area of existing mathematical knowledge.
4. The Topic Should Connect to Your HL or SL Subject (Ideally HL)
Writing your Extended Essay in a subject you study at Higher Level gives you access to the deepest subject knowledge you have developed during your IB Diploma. You are already familiar with the theoretical frameworks, analytical conventions, and academic vocabulary — all of which directly support Criterion B (Knowledge and Understanding).
Writing an EE in an SL subject is entirely possible and can produce excellent results. However, it requires additional independent effort to reach the depth of subject knowledge that HL study develops through the course itself.
5. The Topic Should Sustain Approximately 40 Hours of Independent Research
Your topic must have sufficient intellectual depth and sufficient available material — academic sources, data, investigable phenomena — to sustain 40 hours of rigorous engagement. A topic that is too narrow cannot support this level of investigation.
Test: Before committing, spend 30 minutes researching the topic. Are there sufficient academic sources or investigable phenomena? Is there genuine intellectual complexity? If the landscape feels thin after 30 minutes, the topic may be too narrow.
EE Topic Ideas by Subject Group – Organised Guidance
The following subject-group breakdown provides examiner-informed guidance on what makes a strong Extended Essay topic in each major IB subject group. This is not a list of copy-able titles — it is a framework for understanding what kind of topic works in each subject group, and what examiner conventions govern that subject’s EE. Your research question must be your own, developed through your own interests and refined with your supervisor.
Sciences (Group 4): Biology, Chemistry, Physics, Environmental Systems & Societies |
EE convention: Sciences Extended Essays are typically expected to involve primary experimental data generated by the student. The investigation follows a scientific methodology — a research question with clearly defined variables, a controlled experimental design, data collection, quantitative analysis, and an evidence-based conclusion.
What works: A Sciences EE topic that identifies a specific independent variable with a measurable dependent variable, tested under defined conditions. The topic should be achievable with equipment accessible to the student — ambitious in analytical rigour but realistic in practical scope.
What to avoid: Topics that are purely literature-based in a Sciences EE — relying entirely on secondary sources without primary experimental data — unless the subject’s conventions genuinely support this (certain Computer Science or Physics EEs may do so). Topics requiring professional laboratory equipment not accessible to the student.
Examiner insight: In Sciences EEs, the quality of the research question determines the quality of the methodology — and both determine the ceiling of the Criterion A mark. A precisely constrained research question that identifies one independent variable, one dependent variable, and defined experimental conditions gives the student a clear methodological path. A broad or vague question forces a broad methodology, and broad methodologies cannot be executed rigorously within the EE’s constraints.
For subject-specific support with your Sciences EE, explore our resources for IB Biology IA and EE guidance, who can help you identify viable experimental topics in your chosen discipline.
Individuals and Societies (Group 3): Economics, Business Management, Psychology |
EE convention: Individuals and Societies EEs combine primary or secondary data with theoretical frameworks from the subject. The investigation applies the subject’s analytical tools — economic models, business frameworks, psychological theories — to a specific real-world question.
Economics EEs typically investigate a specific economic event, policy, or market behaviour through the lens of economic theory. The research question should be evaluative — ‘to what extent’, ‘how effectively’ — and the investigation should apply economic models to real-world data rather than simply describing a situation.
Business Management EEs typically investigate a specific business decision, strategy, or challenge for a real, identifiable organisation. A strong BM EE identifies a specific business problem that can be researched through primary and secondary data, and applies relevant BM tools analytically — not decoratively — to reach a conclusion.
Psychology EEs apply psychological theory and research to a focused question about behaviour, cognition, or psychological phenomena. The approach must be grounded in psychological methodology — the research question is genuinely psychological, not general social commentary.
Examiner insight: In Group 3 EEs, the most common weakness at the topic-selection stage is choosing a topic so broad that the investigation can only describe, not analyse. ‘How does economic inequality affect society?’ cannot produce a focused research question. ‘To what extent has the introduction of the National Living Wage in the UK affected youth employment rates between 2016 and 2022?’ can. Specificity at the topic stage creates the conditions for genuine analysis.
For targeted support on Economics and Business EE topics, our IB Economics EE guidance provide examiner-informed guidance on scoping a strong research question.
Language and Literature / Language Acquisition (Groups 1 & 2) |
Group 1 EE convention: Group 1 Extended Essays focus on literary analysis — close reading of one or more texts by a specific author, within a specific literary movement, or around a specific theme or technique. The research question must be one that literary analysis can genuinely answer.
Group 2 EE convention: Group 2 EEs typically focus on comparative linguistic analysis — examining how language functions, varies, or evolves across contexts, registers, or cultures. The analysis applies linguistic frameworks to real language data.
What works in Group 1: A topic that specifies the text or texts, the literary focus (imagery, narrative structure, characterisation, thematic development), and the analytical lens. The research question asks something about the text that literary analysis can answer — not a biographical or historical question.
What works in Group 2: A topic that identifies specific linguistic phenomena in a defined corpus or context, and applies recognised linguistic frameworks — discourse analysis, pragmatics, systemic functional linguistics — to real language data.
Examiner insight: Language EEs frequently suffer from topics too broad for close analysis within 4,000 words. ‘Symbolism in the works of Gabriel García Márquez’ would require a book-length treatment. Restricting to a specific text, a specific literary technique, and a specific analytical lens — while justifying the choice — produces the focus that Criterion A rewards.
Mathematics (Group 5): Math AA and Math AI |
EE convention: Mathematics Extended Essays investigate a mathematical concept, theorem, or application in depth. They require the student to engage with the mathematics themselves — exploring, applying, or extending it in a way that goes beyond summarising existing mathematical knowledge. A Maths EE is a mathematical investigation, not a report on a mathematical topic.
Math AA (Analysis and Approaches) EEs typically involve abstract or analytical mathematical reasoning — exploring proofs, investigating convergence, extending algebraic or calculus concepts, or discovering mathematical patterns through rigorous reasoning. The topic should involve mathematics at a level commensurate with AA HL or SL study.
Math AI (Applications and Interpretation) EEs more commonly involve applied mathematical modelling — using mathematical tools (statistics, differential equations, optimisation) to investigate a real-world phenomenon. The topic should specify the real-world context, the mathematical tools to be applied, and the question the investigation will answer.
Examiner insight: Maths EEs are often weakened by topics that are descriptive rather than investigative — providing a survey of a mathematical area without a genuine investigative question. A strong Maths EE topic has a specific mathematical question the student intends to answer through their own exploration. That question drives the investigation and ensures the essay demonstrates original mathematical engagement.
For investigation structure guidance, see our Math IA Structure & Format guide, or connect with our IB Mathematics EE support for personalised topic and research question guidance.
Arts (Group 6) and World Studies EEs |
Arts EE convention: Extended Essays in Theatre, Visual Arts, Music, Film, and Dance investigate specific artistic works, practitioners, movements, or questions within the discipline. The investigation applies the discipline’s analytical framework to a focused artistic question — not a general appreciation or biography.
What works in Arts EEs: A topic that specifies the work or works to be analysed, the analytical lens (compositional technique, directorial approach, cultural context, aesthetic theory), and the specific question the investigation will address. The research question is one that arts scholarship can genuinely answer through close analysis.
World Studies EE convention: World Studies EEs are interdisciplinary — they examine a global issue through the lens of two distinct IB Diploma Programme subjects. The topic must define both disciplines clearly, identify the global issue being investigated, and justify why the interdisciplinary approach is necessary. Neither subject alone should be sufficient to answer the research question.
Examiner insight: World Studies EEs are often weakened by an imbalance between the two disciplines — one subject doing the analytical work while the other is mentioned superficially. A strong World Studies topic integrates both subjects genuinely: the research question requires both analytical frameworks, and the investigation draws substantially on the methodology of each.
How to Formulate Your EE Research Question – Step by Step
Once you have a topic area in mind, moving from that broad interest to a precise, focused research question requires a systematic process. Here is the seven-step approach our certified IB examiners recommend:
- Start with a broad area of genuine interest within your chosen subject. Not a research question yet — just an area where your curiosity is real and sustained.
- Identify what specifically intrigues you within that area. Narrow to a specific aspect, phenomenon, period, comparison, or question. What do you actually want to find out?
- Review the available research. Spend 30–60 minutes searching academic sources. Is there enough to sustain 40 hours of research? Is there a gap or specific angle existing work does not address?
- Draft a preliminary research question. Check it against four tests: Is it specific? Is it answerable through research, experiment, or analysis? Is it aligned with your subject’s EE conventions? Can it be addressed within 4,000 words?
- Test against the ‘too broad / too narrow’ spectrum. Too broad: your outline requires more content than 4,000 words can contain. Too narrow: insufficient literature, data, or investigable material exists. Adjust accordingly.
- Discuss with your supervisor. Your school-assigned supervisor has subject expertise. Refine your research question based on their feedback — they understand your subject’s EE conventions and can identify weaknesses before you commit.
- Finalise the research question. The question you commit to should be specific, focused, assessable, and aligned with your subject’s conventions. Write it exactly as it will appear in your Extended Essay.
Research question format guidance: ‘To what extent does X affect Y in the context of Z?’ — Evaluative; Sciences, Individuals & Societies ‘How does X influence Y under conditions A and B?’ — Analytical; Sciences, Maths, Language ‘In what ways does X contribute to / reflect / challenge Y in [text / context / period]?’ — Interpretive; Language, Arts ‘Can X be modelled using Y, and how accurately does the model predict Z?’ — Investigative; Maths, Sciences Avoid: ‘An investigation into X’ — this is a topic description, not a research question, and limits Criterion A marks. |
Your EE Supervisor – What to Expect and How to Prepare
Your Extended Essay supervisor is a school-assigned teacher in your chosen subject. The IB requires three mandatory reflection sessions between you and your supervisor throughout the EE process. These sessions are recorded in the Researcher’s Reflection Space (RRS) and assessed under Criterion E (Engagement). Your supervisor guides and advises — they do not write the EE, conduct the research, or provide grade predictions.
How to make the most of your first supervisor meeting. Arrive prepared — not with a blank page, but with a preliminary topic idea and two or three possible research question directions. Supervisors can offer far more useful guidance when there is something concrete to respond to.
What to bring to your first supervisor meeting:
- Your preliminary topic area — the broad subject domain you want to investigate
- Two or three possible research question directions — not final questions, but specific angles you are considering
- Notes from any preliminary reading or research you have done in the area
- Questions about your subject’s EE conventions — what methodology is expected and what the examiner looks for in your specific subject
- An open mind — your supervisor may identify a significant weakness in your initial idea before you commit to it
An important clarification: IB Innovators’ EE guidance complements your supervisor relationship — it does not replace it. Our certified IB examiners provide the examiner-level perspective on topic viability and research question quality that supplements what a school supervisor can offer. The two forms of guidance work together.
Common EE Topic Selection Mistakes (and How to Avoid Them)
Based on the marking experience of our 92+ certified IB examiners across May and November examination sessions, these are the topic-selection mistakes that most frequently result in Extended Essays that underperform against their potential:
Common Mistake | Why It Limits the EE | How to Avoid It |
Choosing a topic with no genuine interest | Criterion E (Engagement) rewards authentic intellectual curiosity — 40 hours of research on a topic you do not care about is very difficult to sustain; examiners detect when engagement is absent | Choose a topic where your genuine interest is real and durable — not where you think it will be easiest |
Topic too broad to address within 4,000 words | Produces a vague research question; forces description over analysis; limits Criterion A and Criterion C marks | Outline what the investigation needs to cover — if it exceeds 4,000 words of substantive content, narrow to a specific time period, geography, company, or condition |
Topic too narrow — insufficient research material | Cannot sustain 40 hours of investigation; leads to superficial analysis; limits Criterion B and Criterion C | Test by researching for 30 minutes — if sources feel thin and data limited, broaden the scope or choose an adjacent topic with more investigable depth |
Choosing a subject not studied at HL or SL | Insufficient background knowledge; risks methodological errors; makes Criterion B very difficult to demonstrate | Write the EE in a subject from your IB Diploma programme — HL is preferable; SL is viable with additional independent study |
Confusing topic with research question | Submitting a topic description as a research question limits Criterion A marks from the outset | Test every draft question: is it a genuine, specific, assessable question? Can your investigation answer it within 4,000 words? |
Choosing a topic based on perceived easiness | Produces weak Criterion E scores; often produces shallow analysis; easier topics frequently generate more generic research questions | Choose a topic that genuinely challenges you — the sustained engagement that intellectual difficulty produces is exactly what Criterion E rewards |
How IB Innovators Supports Your Extended Essay Journey
IB Innovators is a specialised online IB tutoring platform with 92+ certified IB examiners and 8+ years supporting students across the IB Diploma Programme. We have supported students at every stage of the Extended Essay process — from initial topic selection through to final submission.
Our 1-on-1 IA & EE Guidance service pairs you with a Senior IB Examiner — a professional who actively marks Extended Essays in the May and November examination sessions. The feedback you receive on topic selection and research question quality comes from someone who applies the EE rubric from the examiner’s side of the assessment process.
What our EE guidance sessions cover:
- Topic viability review — is your topic specific enough, appropriately scoped, and aligned with your subject’s EE conventions?
- Research question evaluation — does your question satisfy the focus and assessability requirements of Criterion A?
- Supervisor meeting preparation — how to arrive at your first meeting with a viable, well-developed topic idea
- Subject-specific EE convention guidance — what your subject’s examiner expects from an EE in your chosen discipline
- Outline and structure review — does your planned investigation create conditions for strong performance across all five EE criteria?
- Section-by-section rubric-aligned feedback during writing
- Final examiner-perspective read-through before submission
IB Innovators tutors provide guidance, structured advice, and quality improvement strategies — not coursework writing. The Extended Essay is your investigation. Our role is to provide the examiner-level insight that gives you a strong foundation.
Our sessions are delivered through IB Innovators’ online platform, featuring a digital whiteboard, session recordings, and flexible scheduling across UAE, UK, and USA time zones.
Tomas, studying with IB Innovators from the UK, reported achieving 38 IB points with a grade 7 in Business Management. His Extended Essay benefited from structured examiner feedback at the topic selection and drafting stages. |
1-on-1 EE Guidance with Certified IB Examiners — £55/hr Book a free 30-minute consultation to discuss your EE topic and subject. No commitment required — just examiner-level insight before you commit to a direction. |
For additional research question inspiration, browse our IB IA examples by subject, which illustrate how strong research questions are formulated across different IB subjects.
Frequently Asked Questions About Choosing an EE Topic
Start with a subject you study at HL or SL where your genuine interest is sustained. Identify a specific aspect within that subject — narrow enough to develop a focused, assessable research question within 4,000 words, yet broad enough to sustain approximately 40 hours of independent research. Evaluate your topic against five criteria: researchability within 4,000 words, capacity to generate a focused research question, alignment with your subject's EE conventions, connection to a subject you study in the Diploma Programme, and sufficient intellectual depth. Discuss with your supervisor to refine before committing.
Your topic is the broad subject area you are investigating — your starting point. Your research question is the precise, focused, assessable question your Extended Essay must answer — your destination. 'Enzyme activity in Biology' is a topic. 'To what extent does temperature affect the rate of amylase activity at temperatures between 20°C and 60°C?' is a research question. Criterion A (Focus and Method) directly assesses whether the research question is specific and whether the essay addresses it consistently — making this distinction fundamental from the beginning of the EE process.
There is no universally best subject — the right choice depends on your genuine interest, your HL or SL subjects, and your supervisor's expertise in the area. Sciences EEs suit students who enjoy experimental investigation. Individuals and Societies EEs suit those who want to apply theoretical frameworks to real-world cases. Language EEs suit students with strong analytical and textual skills. Mathematics EEs suit students who want to explore mathematical concepts with genuine depth. Choose the subject where your interest and existing knowledge are strongest, and where you can access a supervisor with genuine expertise in the discipline.
The IB Extended Essay has a maximum of 4,000 words. This limit applies to the main body of the essay. References, bibliography, and appendices do not count towards the 4,000-word limit. IB examiners do not read beyond 4,000 words — content beyond this limit is not assessed. Staying within the limit while addressing the research question thoroughly contributes to your Criterion D (Presentation) mark.
Yes — but it is costly in time and momentum. If you realise early that your topic is too broad, too narrow, or genuinely unresearchable within the EE's constraints, changing it is significantly better than persisting with a flawed foundation. Discuss the change with your supervisor immediately. The later you change, the greater the disruption to your timeline. This is precisely why investing time in thorough topic evaluation at the outset saves considerable effort later.
Your school-assigned supervisor guides and advises you throughout the EE process, including in the three mandatory reflection sessions required by the IB. In the first session, they help you evaluate whether your topic idea is viable, appropriately scoped, and aligned with your subject's Extended Essay conventions. They cannot choose your topic for you or conduct the research on your behalf — but their subject expertise is invaluable in identifying weaknesses in your initial idea before you commit significant time to an unsuitable direction.
Your topic directly determines your research question, which is assessed under Criterion A (Focus and Method) — the first of five EE criteria. A poorly scoped topic produces a vague research question, limiting Criterion A marks before you have written a word of analysis. Beyond Criterion A, your topic determines the methodology available to you (affecting Criterion A and Criterion C), the depth of subject knowledge you can demonstrate (Criterion B), and the quality of critical thinking the investigation supports (Criterion C). A strong topic creates the conditions for strong performance across all five criteria. A weak topic constrains every subsequent stage of the investigation.
