Extended Essay Criterion D: Discussion and Evaluation

By Michael Thompson · Education Specialist; 10 years teaching the IB at Bromsgrove School · Published 4 October 2026

Extended essay criterion D, titled 'Discussion and evaluation', is worth 8 marks out of a total of 30 - making it the single most heavily weighted criterion in the updated IB assessment model that applies from May 2027. Its guiding question is blunt: 'Does the student discuss the findings and evaluate the essay?' Many students write strong analysis but then stop short of genuine evaluation, which is where this criterion separates good essays from great ones. This guide explains exactly what criterion D demands, how it connects to the other four criteria, and what you can do in your current draft to improve your marks on it.

Key Takeaways

In This Article

  1. What Criterion D Is and Why It Carries the Most Marks
  2. The Two Tasks Inside the Guiding Question
  3. How Criterion D Fits Into the IB Extended Essay Assessment Criteria
  4. Where Discussion and Evaluation Should Appear in Your Essay
  5. Common Ways Drafts Fall Short on This Criterion
  6. Self-Check Questions for Your Extended Essay Draft
  7. What to Do Next

1. What Criterion D Is and Why It Carries the Most Marks

Extended essay criterion D is titled "Discussion and evaluation." Its guiding question, set by the IB, is: "Does the student discuss the findings and evaluate the essay?" According to the IB's extended essay updates page, it carries 8 marks out of a total of 30, making it the highest-weighted of the five criteria in the new assessment model.

The mark distribution across the five criteria is:

CriterionTitleMarks
AFramework for the essay6
BKnowledge and understanding6
CAnalysis and line of argument6
DDiscussion and evaluation8
EReflection4
Total30

Note on the previous model: Students sitting the EE in November 2026 or earlier are assessed on the old 34-mark model. The new five-criterion, 30-mark model applies from May 2027 onwards, following a guide launch in February 2025.

Criterion D has two distinct demands, both captured in its guiding question. First, discussion: you must engage with the significance of your findings in a balanced way, weighing evidence and comparing interpretations rather than simply presenting what you found. Second, evaluation: you must assess the effectiveness of the essay itself, including its methods, sources, and limitations. These are separate tasks, and an essay that does only one of them is leaving marks on the table.

One non-obvious point worth flagging: Criterion D evaluates the essay, not the learning experience. That distinction matters because evaluating your own growth as a learner maps to Criterion E (Reflection), which is a separate 4-mark criterion. Conflating the two is a genuine structural error, not just a stylistic one.

The EE still combines with Theory of Knowledge for a maximum of 3 combined diploma points, so the quality of your essay, and especially its highest-weighted criterion, feeds directly into your overall diploma score.

2. The Two Tasks Inside the Guiding Question

The guiding question for Criterion D asks: "Does the student discuss the findings and evaluate the essay?" That single sentence contains two distinct demands, and conflating them is an easy way to lose marks on this criterion.

Task 1 is discussing your findings. The IB Extended Essay subject brief frames this as the assessment objective to "discuss in a balanced way the significance of the research findings." Balanced discussion means weighing what your evidence does and does not support. Presenting only the findings that confirm your argument is not discussion - it is advocacy. A well-executed discussion acknowledges conflicting evidence, explains why one interpretation is more defensible than another, and is honest about where the data runs out.

Task 2 is evaluating the essay itself. The same subject brief requires students to "evaluate the effectiveness of the essay." This means assessing the methods and sources you used, identifying their limitations, and explaining how those limitations affect the validity of your conclusions. Listing the sources you consulted is not evaluation. Explaining why a particular source's sample size, publication date, or methodological assumptions constrain what you can conclude - that is evaluation.

The non-obvious point is that evaluation should be integrated throughout the essay, not saved for a final paragraph. It appears in the introduction when you define the scope and acknowledge what your essay will not attempt to prove; in the body when you assess the strengths and weaknesses of your evidence and sources; and in the conclusion when you explain what your findings can and cannot support.

A clean way to keep the two tasks separate:

Summarising what you found answers neither question.

3. How Criterion D Fits Into the IB Extended Essay Assessment Criteria

The five criteria in the updated IB extended essay assessment criteria form a deliberate sequence, not a checklist. The full mark distribution, from the IB's extended essay updates page, is in the table in section 1.

Think of the criteria as layers that depend on each other. Criterion A (Framework) provides the container: a clear research question, appropriate structure, and academic conventions. Criterion B fills that container with knowledge: relevant sources, understood terminology, and a grasp of what the research question actually requires. Criterion C processes that knowledge into analysis: it traces a line of argument from evidence to findings. Only then can extended essay criterion D do its work, because you cannot discuss findings that have not been properly analysed, and you cannot evaluate sources that have not first been identified and understood.

What changed from the old model: the old model included a 12-mark Critical thinking criterion. That block has now been split across Criterion C (Analysis and line of argument, 6 marks) and Criterion D (Discussion and evaluation, 8 marks). Separately, what the old Presentation criterion covered now sits inside Criterion A, and the old 6-mark Engagement criterion has become Criterion E (Reflection) at 4 marks.

That last point matters for how you plan your essay. Criterion D and Criterion E are not the same thing. Criterion D asks whether you have interrogated your findings and evaluated the essay itself. Criterion E asks you to evaluate the effect of the EE learning experience on you as a learner, and it is assessed on your 500-word reflective statement on the Reflection and progress form, not on the essay. A paragraph in the essay about what you learned from the process earns nothing under D and is not where E is assessed.

Without strong criterion D work, an essay stays descriptive. Structure, knowledge, and analysis build the material; discussion and evaluation is where that material is tested against its own limits.

4. Where Discussion and Evaluation Should Appear in Your Essay

Hachette Learning's EE guidance advises integrating evaluation throughout the essay, not reserving it for the conclusion. That single principle shapes where you need to be working hardest.

In the introduction, do three things explicitly: preview what your essay covers, state what it deliberately excludes and why, and flag the key limitations of your methodology before the examiner encounters them in the body. The introduction template in Hachette Learning's guide to structuring an EE names "scope" and "evaluation" as distinct elements, so treat them as essentials rather than optional flourishes. Stating upfront that your primary sources are limited to a specific time period, or that you are setting aside a particular variable, frames your argument honestly from the start.

In the body, evaluate each piece of evidence as you use it. There is a practical distinction worth keeping in mind: what a source explicitly states versus what it only implies. Hachette Learning advises showing an understanding of both the explicit and implicit perspectives of the authors of your secondary sources. Acknowledging counter-evidence, rather than omitting it, is part of the same habit.

In the conclusion, draw together the significance of your findings in relation to your research question. Do not introduce new evidence here. Do address your limitations explicitly and say what they mean for how much confidence you can place in your conclusions.

The 4,000-word limit covers the introduction, body, conclusion and quotations, so there is no slack to absorb an evaluation section that arrives late. A practical self-check: if every evaluative sentence in your draft sits in the final two paragraphs, your Criterion D marks are concentrated in too small a space. Spread them across all three sections before you submit.

5. Common Ways Drafts Fall Short on This Criterion

Six patterns are worth checking for on extended essay criterion D. Recognising them in your own draft is easier once you know what each one looks like.

Describing rather than discussing. Students list what their research found without explaining what it means relative to the research question. A finding is raw material. Discussion is the work of saying how significant that finding is, and why. If your paragraphs read like a summary of results, they are not doing the job this criterion requires.

One-sided argument. The IB subject brief explicitly requires students to "discuss in a balanced way the significance of the research findings." Presenting only evidence that supports your conclusion and ignoring conflicting evidence or alternative interpretations fails that requirement directly.

Confusing Criterion D with Criterion E. Writing about personal growth, what the experience taught you, or how your thinking changed belongs in Criterion E (Reflection). Criterion D is about evaluating the essay itself: its methods, sources, and conclusions. The subject brief gives the two criteria separate guiding questions, and reflection is assessed from your statement on the RPF, so reflective writing in the essay spends words without earning Criterion D marks.

Surface-level source evaluation. Calling a source "reliable" or "from a reputable journal" tells an examiner nothing useful. The question is how the specific characteristics of that source, its methodology, sample size, date, or theoretical framing, affect the argument you are building from it. Generic credibility claims are not the same as evaluation.

Treating limitations as a checklist. Listing limitations in a single block paragraph without connecting each one to its effect on your conclusions is a structural tell. Hachette Learning's guidance notes that evaluation should be integrated throughout the essay, not reserved for one section. Each limitation belongs alongside the conclusion it qualifies.

Weak conclusion. Restating the argument without explicitly revisiting the research question or weighing the strength of the evidence behind your final answer leaves the essay's hardest question unanswered. The research question framed the whole investigation; the conclusion needs to close that loop, not just summarise the journey to it.

6. Self-Check Questions for Your Extended Essay Draft

Print your draft and work through these questions one at a time. They are written for this guide, not taken from IB wording. The full mark descriptors for extended essay criterion D are in the EE subject guide, which your school can access through the IB Programme Resource Centre. The public subject brief lists criterion names and guiding questions only, not the descriptors.

Does my conclusion directly answer the research question? Read the final paragraph in isolation. If someone who had not read the essay could not extract a clear answer to the research question from it, the conclusion is drifting.

Have I explained what my findings mean, not just what they are? Reporting a result is description. Explaining its significance is discussion. Check that each major finding has a "therefore" attached to it.

Have I addressed the strongest counter-evidence? A counterintuitive quirk of this criterion: acknowledging a finding that weakens your argument, and then explaining why your conclusion still holds, is stronger than ignoring it. Selective evidence handling is visible to a trained examiner.

Have I named at least one specific limitation of my method or sources and shown how it affects my conclusions? Vague hedges ("my research has some limitations") add little. A named limitation with a named consequence does far more.

Is evaluation spread across the essay, or only in the final paragraph? The guiding question asks whether you "discuss the findings and evaluate the essay", and that evaluation works best spread through the essay rather than saved for the end. Check the introduction and body paragraphs, not just the conclusion.

Am I confusing Criterion D with Criterion E? Criterion D covers evaluation of the essay and its findings. Criterion E (Reflection, 4 marks) covers the effect of the EE learning experience on you as a learner. If a sentence starts "This essay taught me...", it belongs in the RPF, not here.

7. What to Do Next

Open your current draft this week and read through it with two highlighters. Mark every sentence that describes what you found in one colour, and every sentence that evaluates - that weighs significance, acknowledges a limitation, or judges the effectiveness of your method - in a second colour. If fewer than one evaluative sentence appears per page on average, that section needs work before your next supervisor meeting. The imbalance is usually most visible in the conclusion, where description tends to crowd out judgement.

One other practical step: ask your supervisor for the relevant pages from the extended essay guide on the IB Programme Resource Centre. The full mark descriptors for Criterion D live there, not in any public summary. Reading the actual descriptors for the top mark band will tell you precisely what the examiner expects to see. Request those pages and read them before you revise.

FAQ

What does extended essay criterion D assess?

Criterion D, titled 'Discussion and evaluation', assesses whether the student discusses the significance of their research findings in a balanced way and evaluates the effectiveness of the essay itself - its methods, sources, and limitations - and is worth 8 of the 30 available marks.

How is the new extended essay marked differently from the old one?

The updated model has five criteria totalling 30 marks (down from 34), with criterion D carrying 8 marks as the highest-weighted criterion; the first assessment on this model is May 2027, and November 2026 is the last session on the previous 34-mark framework.

What is the difference between criterion D and criterion E in the extended essay?

Criterion D (Discussion and evaluation, 8 marks) focuses on evaluating the essay's findings, methods, and sources; criterion E (Reflection, 4 marks) focuses on the effect of the EE learning experience on the student as a learner and is assessed on the reflective statement on the RPF - they are assessed separately.

Is extended essay criterion D difficult to do well on?

The main challenge is that it requires genuine evaluation - weighing evidence, acknowledging limitations, and engaging with counter-arguments - rather than description, so students who summarise findings without interrogating them tend to underperform on this criterion.

Does discussion and evaluation only belong in the conclusion of the extended essay?

No - evaluation should appear throughout the essay: in the introduction when previewing scope and limitations, in the body when assessing sources and evidence, and in the conclusion when weighing the significance of findings relative to the research question.

Are there grade boundaries for the 30-mark extended essay?

No grade boundaries have been published yet for the 30-mark scale; the IB will set them after the May 2027 assessment session, with results expected on 6 July 2027.

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