IGCSE Command Words 2026: The Complete Guide (A-Z)
IGCSE command words are the instruction verbs in exam questions (such as Describe, Explain, Evaluate, Calculate, Suggest, State, Define) that tell you exactly what kind of response the examiner expects. They determine the depth of thinking required (aligned with assessment objectives and Bloom’s taxonomy) and how marks are awarded in the mark scheme.
When you interpret command words correctly, you structure answers to match the CAIE glossary [1] expectations, avoid common misconceptions, and save time under exam pressure. Mastering IGCSE command words is one of the highest-impact exam technique upgrades for scoring consistently across Science papers and Humanities.
Understanding IGCSE command words to decode exam questions
IGCSE command words are the instructional verbs in exam questions that tell you exactly what the examiner is testing and how your response will be credited in the mark scheme. If you misread a single verb (for example, treating State as Explain), you can write a “good” answer that still scores poorly because it does not meet the assessment objectives.
Based on our years of practical tutoring at Times Edu, the fastest mark gains often come from answering what the question is asking, not from learning more content. IGCSE command words help you map a question to the right depth on Bloom’s taxonomy [2], so you can spend time where marks are actually available.
A critical detail most students overlook in the 2026 exam cycle is that examiners are increasingly strict about precision and structure for mid-to-high tariff questions. This is not about writing more; it is about matching the CAIE glossary definitions and aligning with the mark scheme logic.
Why command words matter for assessment objectives
Many international school students revise topics, then “free-write” in exams and hope the examiner rewards effort. That approach fails because IGCSE assessment objectives (AO) are not vague; they are operationalized through command words.
- AO1 (Knowledge and understanding): Commonly triggered by Define, State, Identify, List
- AO2 (Application): Commonly triggered by Describe, Use, Calculate, Determine
- AO3 (Analysis and evaluation): Commonly triggered by Explain, Analyze, Compare, Evaluate, Justify
From our direct experience with international school curricula, high achievers treat the command word as a scoring algorithm: it tells you how many points you must make, what type of reasoning is required, and how evidence should appear.
The difference between Describe, Explain and Evaluate
These three verbs sit on different levels of Bloom’s taxonomy and generate different marking patterns. Students often blur them, which creates answers that are either under-developed (lost marks) or over-developed (time loss).
Command word comparison table (what the examiner expects)
| Command word | What you must do | Evidence style | Typical mark scheme pattern | Common student error |
|---|---|---|---|---|
| Describe | Give observable features, trends, steps, or what happens | Factual statements; may use data | 1 mark per correct feature; may credit sequence | Explaining “why” instead of stating “what” |
| Explain | Give reasons/mechanisms linking cause to effect | Because-therefore chain; scientific or logical reasoning | Marks for linked statements; credit hinges on clear causality | Listing facts without a causal link |
| Evaluate | Make a balanced judgement using evidence, then conclude | Pros/cons, limitations, significance, conditions | Marks for both sides + reasoned conclusion | Giving an opinion without evidence or balance |
The pedagogical approach we recommend for high-achievers is to treat Describe as “camera mode,” Explain as “mechanism mode,” and Evaluate as “debate mode with a verdict.” This mental switch prevents you from writing the wrong type of response.
Micro-structures you can reuse in any subject
Describe (2–4 marks):
- Feature 1
- Feature 2
- Feature 3
- If data is provided: trend + supporting number(s)
Explain (3–6 marks):
- Point (cause)
- Link (mechanism)
- Outcome (effect)
- Repeat for each mark-bearing link in the mark scheme
Evaluate (6–8+ marks in some humanities contexts):
- Argument for option A + evidence
- Argument against option A (or for option B) + evidence
- Weighting: when does each argument matter more?
- Judgement: which is stronger and why, under stated conditions
Common misconceptions that lower marks
- “Longer answers score higher.” Examiners credit points, not paragraphs.
- “If I know the topic well, I can ignore the command word.” The mark scheme is written around the command word.
- “Evaluate means criticize.” Evaluation is balanced, not purely negative.
How command words dictate the number of marks awarded
IGCSE papers are engineered so the command word controls the response type and the granularity of marks. Your exam technique should begin with converting marks into a writing plan.
A practical planning rule (marks → points)
- 1 mark: One precise fact, term, or value (often State, Identify, Define)
- 2 marks: Two separate facts/features, or one fact + one correct qualifier
- 3–4 marks: Multiple linked statements, short sequence, or brief explanation
- 5–6+ marks: Structured explanation, comparison, or evaluation with evidence
Based on our years of practical tutoring at Times Edu, students who write a “mini-plan” in 5–10 seconds score higher and finish with less stress. The plan is not optional in calculation and evaluation questions.
Mark scheme behavior you must anticipate
- Point-based credit: Many schemes award 1 mark per distinct, correct statement.
- Link marks in Explain: You may get partial credit for correct facts, but full credit requires a clear link (cause → effect).
- Quality-of-argument in Evaluate: Credit often comes from balance, relevance, and justified judgement.
Where grade boundaries enter the strategy
Grade boundaries are not something you can “revise,” but they do shape how you allocate time. If you are targeting a top grade, you must convert borderline marks into secure marks by mastering command words that trigger AO3 (Explain, Evaluate, Justify).
A high-performing strategy is to prioritize:
- Consistent AO1 marks (no careless losses on Define/State)
- Clean AO2 execution (Describe with accurate data references; Calculate with correct method)
- Selective AO3 excellence (Evaluate with balance and a defended judgement)
How subject choice interacts with command words for university profiles
From our direct experience with international school curricula, subject choice is most powerful when it aligns with your intended major and lets you demonstrate higher-order thinking. Universities care about signals: rigorous subjects, strong grades, and coherence with your narrative.
- STEM-leaning profiles benefit from subjects with frequent Calculate, Explain, Suggest prompts because they show application and reasoning.
- Humanities and business profiles benefit from strong performance on Evaluate, Discuss, Compare styles because they show argumentation and judgement.
Times Edu’s counseling framework links academic route planning to both achievement potential and admissions positioning, instead of treating subjects as isolated checkboxes.
List of common command words for science subjects
Science papers reward precision, method, and clear reasoning. The CAIE glossary definitions (or your board’s equivalent) are your compliance checklist for wording and structure.
Science-focused command words and what to write
| Command word | What the examiner wants | High-scoring answering strategy | Typical pitfalls |
| Define | Exact meaning of a term | One sentence, includes key qualifiers | Using an example instead of a definition |
| State | A single fact | Short and direct | Adding unnecessary explanation that introduces errors |
| List | Several items | Separate lines; no repeats | Writing paragraphs; repeating the same idea |
| Describe | What you observe / what happens | Stepwise, or trend + data | Explaining mechanisms instead of observations |
| Explain | Why/how it happens | Cause → mechanism → effect | Missing the link word “because/therefore” logic |
| Suggest | Plausible idea based on context | Use the given data; propose one or two logical ideas | Guessing outside the scenario; too many options |
| Calculate | Correct method and value | Write formula, substitute, show units, final answer | No working; wrong units; premature rounding |
| Determine | Find value from data/graph | Read accurately; show method | Misreading axes; ignoring scale |
| Compare | Similarities and differences | Use comparative language; pair points | Listing features without comparison |
| Predict | Expected outcome | Use pattern/trend; justify briefly | Pure guess; no reference to data |
| Justify | Reasoned support | Claim + evidence + reasoning | Opinion without evidence |
A critical detail most students overlook in the 2026 exam cycle is that units and significant figures are not cosmetic in science papers. Mark schemes often include method marks and final answer marks that depend on correct units and appropriate rounding.
How science command words map to assessment objectives
- AO1: Define, State, Identify, List
- AO2: Describe, Use, Determine, Calculate
- AO3: Explain, Suggest (in context), Compare (with reasoning), Evaluate (rare but present in some syllabi)
Based on our years of practical tutoring at Times Edu, students who annotate command words at the start of practice papers improve faster than students who do more papers without reflection. Quality of feedback beats volume of attempts.
Strategies for answering calculation-based command terms
Calculation questions are where strong students lose marks through process errors, not content gaps. Your answering strategy must be procedural, consistent, and mark-scheme aligned.
The “method-first” calculation routine
- Write the relevant equation or principle (even if obvious).
- Substitute values with units (convert units first if needed).
- Show intermediate steps to secure method marks.
- Check magnitude (sanity check: does it make sense?).
- Final answer with units and appropriate significant figures.
This is an exam technique discipline. It prevents avoidable losses when you are under time pressure.
A mark-scheme aligned checklist
- Formula shown: Secures method marks
- Correct substitution: Secures process credit
- Working visible: Protects you if arithmetic slips
- Units correct: Protects the final answer mark
- Rounding at the end: Avoids cumulative error
Common misconceptions in Calculate questions
- “If I get the final value right, I do not need working.” Many mark schemes award credit for method and can deny full marks if working is absent.
- “Rounding early saves time.” Early rounding can lose marks; round at the end unless the question specifies otherwise.
- “Units are optional.” Units are often embedded in the mark scheme, especially in physics and chemistry.
How to handle command variants: Calculate vs Determine vs Show
- Calculate: Expects a numerical computation with method.
- Determine: Often expects extracting a value from a graph/table or using given information with minimal computation.
- Show that: Expects you to reach a stated value; method clarity is the primary scoring route.
From our direct experience with international school curricula, top-scoring students treat every calculation like a mini-proof: the examiner should be able to follow your logic without guessing what you did.
Frequently Asked Questions
What does Suggest mean in IGCSE exams?
Suggest asks for a plausible, context-based idea that follows logically from the information provided. In many science papers, Suggest is a test of application: you use evidence, patterns, or principles to propose a reasonable explanation, method, or improvement.
A strong Suggest answer is usually 1–3 concise points that directly connect to the scenario. Weak Suggest answers are broad guesses that ignore the data, or long lists that contradict each other.
Is there a difference between State and List?
Yes, and it matters for marks and time management. State typically requires one correct fact or point written as a short phrase or sentence, while List requires several distinct items, usually presented separately.
A practical rule is:
- If the question says State, aim for one precise point with no extra commentary.
- If the question says List, give the required number of items (or as many as you can), each clearly separated to help the examiner award marks quickly.
Based on our years of practical tutoring at Times Edu, students often lose easy marks by writing a paragraph for State (and accidentally adding an incorrect detail), or by giving only one item for List when multiple marks are available.
How do I answer an Evaluate question in IGCSE?
An Evaluate question requires balanced judgement supported by evidence. You should present arguments on more than one side, then conclude with a reasoned decision that explains why one side is stronger under stated conditions.
Use this structure:
- Claim 1 (benefit/strength) + evidence
- Claim 2 (limitation/weakness) + evidence
- Weighing (which matters more, and when)
- Judgement (your final position with justification)
The mark scheme typically rewards relevance, balance, and justified conclusion. Evaluation is not about being “neutral”; it is about showing you can judge quality and significance.
What is the hardest command word in IGCSE?
There is no universally “hardest” command word, but Evaluate and high-tariff Explain questions are where most students drop marks. These verbs require structured reasoning aligned to assessment objectives, not just recall.
For some students, Suggest is deceptively difficult because it penalizes unfocused guessing. The hardest command word is usually the one you have not trained with a repeatable answering strategy.
Do command words change between different exam boards?
The core IGCSE command words are broadly consistent across major exam boards because they reflect standard assessment design and Bloom’s taxonomy. The exact phrasing, glossary definitions, and how strictly each verb is enforced can differ, so you should always check your board’s official guidance (for CAIE students, the CAIE glossary is a key reference).
A safe approach is to learn the stable meanings (Define, State, Describe, Explain, Evaluate, Calculate, Suggest) and then calibrate using past papers and mark scheme language from your specific board. Times Edu’s tutoring programmes do this calibration early so students do not train the wrong response style.
How much should I write for a Describe question?
Write one mark’s worth of content per point, not a paragraph. If it is a 2-mark Describe, aim for two distinct, accurate features.
If it is a 4-mark Describe with data, include trends and supporting numbers.
A high-scoring Describe answer is dense with correct observations and avoids unnecessary explanations. Based on our years of practical tutoring at Times Edu, students who keep Describe answers compact preserve time for Explain and Evaluate questions that carry higher thinking-demand marks.
Where can I find a glossary of IGCSE command words?
Start with your exam board’s official documents and the command word guidance embedded in past papers and mark schemes. For CAIE candidates, the CAIE glossary is a widely used reference point, and your syllabus documentation often clarifies how command words are applied in that subject.
If you want a personalized roadmap, Times Edu can map the command words in your target subjects (Science papers and Humanities included) to your current performance profile, then build a practice plan tied to assessment objectives and grade targets.
Conclusion
IGCSE command words are not vocabulary; they are a scoring system. When you align your answering strategy to assessment objectives, Bloom’s taxonomy, and the mark scheme, you stop donating marks through mismatch and time waste.
Based on our years of practical tutoring at Times Edu, the quickest improvement pathway is:
- Build a personal command word bank with model sentence starters for each verb
- Drill past-paper questions by command word category (Describe/Explain/Evaluate/Calculate)
- Review mark schemes for point patterns, not just final answers
- Track mistakes as “command word errors” (wrong response type), not just “topic errors”
If you are aiming for top grades and competitive university pathways, contact Times Edu for a personalized subject selection and revision roadmap. Our approach integrates exam technique, assessment-objective targeting, and academic planning so your IGCSE results strengthen your broader international admissions profile.
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