IBDP Core • Extended Essay • Written by the PrepSeven Editorial Team, reviewed by certified IB Examiners

The Complete IB Extended Essay Guide: How to Score an A

Of the three core elements every IB Diploma Programme student must complete, the Extended Essay (EE) is the one that intimidates students the most — and for good reason. It is the closest thing to university-level research most 16 to 18 year olds will have attempted, and it asks for independence, discipline, and academic maturity in equal measure. Yet the EE is also one of the most learnable parts of the Diploma. Once you understand exactly what the five assessment criteria reward, the process stops feeling like a mystery and starts feeling like a checklist you can work through methodically. This guide, put together by PrepSeven’s team of certified and former IB examiners, walks you through everything from choosing a topic to submitting your final draft, so you can approach your EE with a clear plan instead of last-minute panic.

What Is the IB Extended Essay?

The Extended Essay is an independent, self-directed piece of research culminating in a 4,000-word paper, written under the guidance (but not the direction) of a supervisor at your school. It is one of the three components of the DP core, alongside Theory of Knowledge (TOK) and Creativity, Activity, Service (CAS), and it is compulsory for every Diploma candidate regardless of which six subjects they are studying.

Unlike your Internal Assessments, which are tied to a specific subject’s syllabus content, the EE gives you far more freedom to explore a question you are genuinely curious about. You choose the subject area (from the approved DP subject list, or as an interdisciplinary “World Studies” essay), you choose the research question, and you are responsible for finding, evaluating, and synthesising your own sources or data.

Why the Extended Essay Matters More Than Students Think

It’s tempting to treat the EE as a box-ticking exercise, but that mindset usually backfires. Three reasons to take it seriously from day one:

• Bonus points: Your EE and TOK grades combine on a matrix to award 0–3 extra Diploma points. A strong EE paired with a solid TOK grade is one of the most reliable ways to secure the points that push a 38 to a 40, or a 41 to a 43.
• University applications: Competitive universities, especially in the UK and US, view the EE as genuine evidence of independent research ability. Admissions tutors regularly ask about EE topics at interview.
• Transferable skill-building: The EE is often a student’s first experience of a literature review, a structured argument sustained over thousands of words, and formal academic referencing — all skills that map directly onto undergraduate coursework.

How to Choose the Right Extended Essay Topic

Topic selection is where most students either set themselves up for a smooth process or an unnecessarily painful one. Your EE must sit within one of the approved DP subjects (or be a genuinely interdisciplinary World Studies essay spanning two subjects), and it must be a topic you can sustain real interest in for eight to twelve months.

A Practical Topic-Selection Checklist

• Does this topic genuinely interest me, beyond just being ‘easy to write about’?
• Is it narrow enough to explore in real depth within 4,000 words?
• Can I actually access the sources, data, texts, or experimental materials I would need?
• Does it let me demonstrate analysis and evaluation, not just description or summary?
• Have I checked that a similar essay hasn’t already been widely written (to avoid a generic angle)?
• Does my school have a supervisor with relevant subject expertise available?

If you’re stuck for inspiration, look at your Internal Assessments, class discussions that sparked follow-up questions, subjects you’re taking outside your six DP subjects, or personal experiences that connect to an academic discipline. A geography student fascinated by urban planning in their home city, or an economics student curious about a specific local market failure, will always write a more engaged essay than one who picked a generic, frequently-Googled topic.

Crafting a Strong, Focused Research Question

Your research question is the single most important sentence in your entire EE. A vague or overly broad question makes every later step harder — you’ll struggle to know what to research, what to include, and what your own argument even is. A well-focused question does the opposite: it tells you exactly what evidence to gather and what shape your argument should take.

Too broad: “How has social media affected teenagers?” — no specific angle, no clear method, impossible to answer in 4,000 words.

Well-focused: “To what extent did Instagram usage influence body image perception among 16–18 year old female students in Delhi between 2022 and 2024?” — specific population, specific platform, specific time frame, and a clear analytical angle (“to what extent”).

Good research questions in most subjects follow a similar formula: a command phrase (“to what extent”, “how effectively”, “in what ways”) + a specific, narrow subject + a defined scope (place, time period, population, text, or dataset). Show your draft question to your supervisor before you commit — this single conversation saves weeks of wasted research.

The Ideal Extended Essay Structure

While structure varies slightly by subject group (a science EE will look different from a History or Literature EE), almost every strong essay follows this skeleton:

1. Title page: research question, subject, and word count (no name, per IB’s anonymity rules).
2. Contents page: clear section headings with page numbers.
3. Introduction (roughly 400–500 words): context, the research question stated explicitly, and your rationale for choosing it.
4. Body (roughly 2,800–3,200 words): organised into logical sections or sub-questions, each building your overall argument with evidence, analysis, and evaluation — not just a chronological summary of what you read.
5. Conclusion (roughly 400 words): a direct answer to your research question, an honest discussion of limitations, and suggestions for further research.
6. References and bibliography: consistent citation style (MLA, APA, or Chicago) applied throughout.
7. Appendices (optional): raw data, transcripts, or supplementary material referenced but not essential to the argument itself.

Research and Analysis Tips That Examiners Reward

The single biggest gap between a B-grade EE and an A-grade EE is the ratio of analysis to description. Examiners consistently reward essays that argue, evaluate, and interpret evidence rather than simply reporting it.

• Use a mix of primary sources (interviews, experiments, primary texts, datasets) and secondary sources (academic literature, scholarly commentary) wherever your subject allows it.
• After every piece of evidence, ask yourself: ‘so what?’ — explain what this evidence proves, and why it matters for your argument.
• Actively engage with counter-arguments or alternative interpretations, rather than only including evidence that supports your thesis.
• Keep a running research log from day one — it will make writing your reflections and your Introduction far easier later.
• Avoid over-reliance on a single source or website; examiners can tell when research is shallow.

The Reflections Process (RPPF): Why It Can’t Be Ignored

Since the 2018 EE guide, every candidate must complete the Reflections on Planning and Progress Form (RPPF) — a maximum 500-word reflection built from at least three formal reflection sessions with your supervisor, including a concluding ‘viva voce’ style interview. This form is submitted alongside your essay and is directly assessed under Criterion E (Engagement).

Students frequently underestimate the RPPF because it feels administrative rather than academic. In reality, it’s worth 6 of your 34 marks — the same weight as your entire introduction and conclusion combined. Use it to reflect honestly on the decisions you made, the obstacles you overcame, and how your thinking evolved, rather than simply summarising what you did.

IB Extended Essay Assessment Criteria Explained (A–E)

The EE is marked out of 34 across five criteria. Understanding exactly what each one rewards is the fastest way to raise your grade.

Criterion A — Focus and Method (6 marks)

Assesses the clarity of your research question, how well it’s contextualised within your subject, and whether your chosen methodology is appropriate and effective for answering it.

Criterion B — Knowledge and Understanding (6 marks)

Assesses your understanding of the subject-specific concepts and terminology used, and how well your essay is situated within the relevant academic or disciplinary context.

Criterion C — Critical Thinking (12 marks)

The heaviest-weighted criterion by far. Assesses the quality of your analysis, evaluation, and argument — this is where description-heavy essays lose the most marks, and where genuinely analytical essays pull ahead.

Criterion D — Presentation (4 marks)

Assesses whether the essay follows the required structural conventions: title page, contents, consistent referencing, appropriate length, and legible formatting.

Criterion E — Engagement (6 marks)

Assessed entirely through the RPPF. Rewards genuine intellectual initiative, reflection on the research process, and evidence of independent thinking throughout.

Common Mistakes That Cost Marks

A few recurring issues show up across almost every EE marked below the top band: an unfocused research question, descriptive rather than analytical writing, weak or rushed reflections, and inconsistent referencing. We cover each of these in depth, with real fixes, in our companion guide, Common IB Extended Essay Mistakes Students Should Avoid.

How PrepSeven Helps You Score an A in Your Extended Essay

PrepSeven’s tutors are certified or former IB examiners who have personally marked hundreds of Extended Essays across every subject group. Instead of generic writing advice, we help you build a research question that’s actually answerable, structure your argument around the criteria examiners use, and give you the kind of specific, criterion-referenced feedback your school supervisor may not have time to provide.

• One-on-one topic and research question consultations
• Structured supervision through every draft, from outline to final submission
• Criterion-by-criterion feedback from examiners who have marked real EEs
• RPPF and viva voce preparation support

Frequently Asked Questions

Q1. What is the maximum mark for the IB Extended Essay?

The EE is marked out of 34, across five criteria (A–E). Combined with your TOK grade on the core points matrix, it can contribute up to 3 additional Diploma points.

Q2. Can I write an interdisciplinary Extended Essay?

Yes. The ‘World Studies’ EE category allows you to explore a globally significant issue through the lens of two DP subjects, provided it meets the same rigour and structure requirements as a single-subject EE.

Q3. How long should my RPPF reflections be?

The RPPF has a strict maximum of 500 words across all reflection sessions combined, so each entry should be concise, specific, and focused on genuine intellectual development rather than a narrative of what you did day to day.

Q4. How do examiners actually grade the EE?

Examiners are trained on official markbands and exemplar essays for each of the five criteria, and every essay is externally assessed (not by your own school) to ensure consistency across the world.

Q5. Is the IB Extended Essay similar to the UK’s Extended Project Qualification (EPQ)?

They’re similar in spirit — both are independent research projects — but the EE has a stricter word count, a mandatory reflections process (RPPF), and is assessed against IB’s own five-criterion rubric rather than the EPQ’s grading system.

Q6. What happens if I plagiarise in my Extended Essay?

The IB treats plagiarism as a serious academic honesty violation. Essays found to include unattributed material can be awarded a mark of zero for the EE, and in serious cases, can jeopardise the entire Diploma. Always cite consistently and keep a research log as evidence of your own process.

Q7. When should I start working on my Extended Essay?

Most schools introduce the EE toward the end of the first year of the DP (Year 12). Starting your topic exploration and initial reading early — ideally over the summer between Year 12 and Year 13 — gives you significantly more room to refine your research question before deadlines tighten.

Q8. How do I choose the right EE supervisor?

Choose a teacher with genuine expertise in your topic area wherever possible, not simply the teacher who currently teaches your class. A supervisor who understands your specific research area can ask sharper questions during reflection sessions and flag gaps in your argument earlier.