Understanding how the Extended Essay is graded is one of the most effective ways to improve your final mark, because the assessment is based on five explicit, published criteria — meaning you can write directly toward what examiners are looking for at every stage, rather than guessing.
The Five Assessment Criteria
Criterion A: Focus and Method (6 marks) Assesses the clarity and specificity of your research question, the appropriateness of the methodology you use to address it, and how well the topic is framed within its subject. A vague or overly broad research question caps this criterion regardless of how well the rest of the essay is written.
Criterion B: Knowledge and Understanding (6 marks) Assesses how well you demonstrate subject-specific knowledge and understanding relevant to your research question, and how effectively you situate your essay within an appropriate academic context.
Criterion C: Critical Thinking (12 marks) The single most heavily weighted criterion, assessing the quality of your analysis, evaluation, and argument construction. This is where narrative writing (see our guide on avoiding narrative in History EEs), weak evaluation, and purely descriptive content are most heavily penalized.
Criterion D: Presentation (4 marks) Assesses whether the essay follows the required structural conventions — title page, table of contents, page numbering, appropriate referencing and bibliography format, and adherence to the word count.
Criterion E: Engagement (6 marks) Based on your Reflections on Planning and Progress Form (RPPF), this criterion assesses your intellectual and personal engagement with the research process — including how you responded to challenges and developed your thinking throughout the essay’s development.
Total Marks and Grade Boundaries
The Extended Essay is marked out of 34 total marks, which then map to a letter grade from A (highest) to E (lowest), each contributing (alongside your Theory of Knowledge grade) to up to 3 additional bonus points toward your overall 45-point Diploma score.
Where Most Students Lose Marks
Critical Thinking (Criterion C) is worth more than a third of the total marks, yet it’s consistently the criterion where average essays lose the most points — usually because the essay describes rather than analyzes, or presents evidence without clearly evaluating its significance or limitations.
Focus and Method (Criterion A) is the second most common area for lost marks, almost always traced back to a research question that’s too broad, too narrow, or not clearly analyzable (see our full guide on writing a strong Extended Essay research question).
What Separates an A-Grade Essay From a C-Grade Essay
The difference rarely comes down to subject knowledge alone. A-grade essays consistently show: a precise, well-scoped research question; sustained analytical argument rather than description; explicit engagement with counterarguments or alternative interpretations; and genuine reflection on the research process in the RPPF, showing real intellectual development rather than a generic account of “what I did.”
How to Use the Criteria While Writing (Not Just Before Submitting)
Rather than reading the criteria only at the final review stage, check your draft against Criteria A and C after every major section — specifically asking “does this paragraph analyze, or does it just describe?” This habit, applied throughout the writing process rather than only at the end, is one of the most effective ways to raise your final grade.
Final Tip
Ask your supervisor to assess your draft specifically against Criterion C (Critical Thinking) before your final submission — since it’s worth more marks than any other criterion, targeted feedback here typically has the biggest impact on your final grade.