How to Study Exam Command Words | Define, Describe, Explain, Analyse, Compare, Evaluate and Justify

How to study exam command words: learn what each verb asks you to do, build a short answer rule for it, compare neighbouring verbs such as describe versus explain and assess versus evaluate, then practise switching command words while keeping the topic constant.

Command words are small, but they control the architecture of an exam answer. A student can know the content and still lose marks by describing when the question asks for explanation, listing when the question asks for comparison, or presenting evidence without making the judgement required by evaluate.

AQA describes command words as the words and phrases in assessment tasks that tell students how they should answer. Across current AQA subject guidance, define means specify meaning, compare means identify similarities and/or differences, explain means give reasons, evaluate means judge from available evidence, and justify means support a case with evidence. Subject conventions can vary, so students should learn the definitions used in their own course as well as the general pattern.

This guide treats exam command words as a trainable exam system. The student must recognise the demand, choose the answer function, retrieve the relevant knowledge, produce the response independently, and then check whether the same method survives a changed topic or question.

This approach is especially useful when a student needs to:

decode exam questions quickly;
stop answering the topic instead of the verb;
distinguish describe from explain;
distinguish analyse from evaluate;
write comparisons explicitly;
make evidence-based judgements;
use mark schemes more intelligently;
switch answer structures under time.

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Treat the Command Word as the Job Description

The command tells the student what the answer must do.

Topic knowledge supplies the material, but the command supplies the function. The practical test is whether the student can construct the required answer without a model response supplying the structure. That makes the response itself the evidence of learning.

What to do

Underline the verb.
Restate it in plain language.
Decide the required output.
Then retrieve content.

Keep the practice task small enough that the missing function is easy to identify. A single command-word switch, one judgement paragraph or one evidence pair can reveal more than a long passive review.

Worked example

A question on climate change can ask define, explain, compare or evaluate; the topic is the same, but the answer architecture changes completely.

After the attempt, compare with an authoritative course source, teacher feedback or marking standard only after committing. Identify the smallest missing feature, close the model and produce the improved response independently.

Common mistake

Do not begin writing merely because the topic looks familiar.

If the same weakness returns, change the intervention. Compare two command words directly, use a contrasting model, reduce the question to one paragraph, or practise the same reasoning on a different topic.

Learn Define and State

These are usually concise recall commands.

They ask for clear meaning or information rather than developed reasoning. The practical test is whether the student can construct the required answer without a model response supplying the structure. That makes the response itself the evidence of learning.

What to do

Use the recognised term.
Keep scope tight.
Include necessary conditions.
Stop when complete.

Worked example

Define diffusion receives the necessary features of the process rather than a paragraph about examples and applications.

Common mistake

Do not turn a low-mark definition into an essay.

Learn Describe

Describe gives an account of characteristics, pattern or what is observed.

Description answers what, not necessarily why. The practical test is whether the student can construct the required answer without a model response supplying the structure. That makes the response itself the evidence of learning.

What to do

State the feature.
Use relevant evidence.
Use sequence or pattern where useful.
Avoid unsupported causes unless asked.

Worked example

A graph description states that values rise rapidly and then plateau, supported by values, without adding a mechanism.

Common mistake

Do not automatically explain causes in a describe-only question.

Learn Explain

Explain gives reasons, mechanisms or purposes.

An explanation needs the relationship connecting cause and effect. The practical test is whether the student can construct the required answer without a model response supplying the structure. That makes the response itself the evidence of learning.

What to do

State what happens.
State why.
Link the mechanism.
Carry the chain to the requested outcome.

Worked example

Rather than saying temperature increases reaction rate, the answer links temperature to particle energy, successful collisions and rate.

Common mistake

Do not restate the observation and call it explanation.

Learn Compare and Contrast

Compare identifies similarities and/or differences; contrast emphasises differences.

The relationship must be explicit. The practical test is whether the student can construct the required answer without a model response supplying the structure. That makes the response itself the evidence of learning.

What to do

Choose shared criteria.
Use both sides in the same paragraph.
Use comparative language.
Support with paired evidence.

Worked example

Both systems centralise decision-making, whereas they differ in how authority is enforced.

Common mistake

Do not write two separate descriptions and expect the examiner to infer the comparison.

Learn Analyse

Analyse separates information into components and examines relationships or characteristics.

Analysis moves beyond description by showing how parts work together or create an effect. The practical test is whether the student can construct the required answer without a model response supplying the structure. That makes the response itself the evidence of learning.

What to do

Break the material into parts.
Identify relationships.
Use evidence.
Explain significance.

Worked example

A language-analysis answer identifies a word choice, explains its connotations and connects it to the writer’s effect.

Common mistake

Do not label a technique without analysing what it does.

Learn Evaluate

Evaluate requires a judgement from available evidence.

A strong answer establishes criteria, weighs evidence and reaches a conclusion. The practical test is whether the student can construct the required answer without a model response supplying the structure. That makes the response itself the evidence of learning.

What to do

Identify the proposition.
Choose evaluation criteria.
Use evidence for strengths and limitations.
Make the judgement explicit.

Worked example

An evaluation of a policy weighs effectiveness, cost and unintended effects before reaching a qualified conclusion.

Common mistake

Do not write a list of advantages and disadvantages without deciding what they mean.

Learn Justify

Justify supports a choice, claim or action with evidence.

The answer should show why the selected position is defensible. The practical test is whether the student can construct the required answer without a model response supplying the structure. That makes the response itself the evidence of learning.

What to do

State the choice.
Give the strongest reason.
Use evidence.
Address a plausible alternative where marks justify it.

Worked example

The student chooses Option B and justifies it with cost, capacity and implementation evidence from the case.

Common mistake

Do not repeat the choice without support.

Learn Discuss

Discuss usually requires relevant perspectives or key points and, in many subjects, a reasoned conclusion.

Balance does not mean equal space for weak and strong arguments. The practical test is whether the student can construct the required answer without a model response supplying the structure. That makes the response itself the evidence of learning.

What to do

Identify major positions.
Use relevant evidence.
Consider strengths and limitations.
Conclude in line with the evidence.

Worked example

A Geography discussion weighs competing explanations and concludes which matters more under the stated context.

Common mistake

Do not produce an unconnected list of for and against points.

Learn Assess

Assess asks for an informed judgement.

It is often close to evaluate, though course-specific wording matters. The practical test is whether the student can construct the required answer without a model response supplying the structure. That makes the response itself the evidence of learning.

What to do

Set criteria.
Examine evidence.
Weigh importance.
State judgement.

Worked example

Assess the importance of transport means the answer must decide how important transport was relative to other factors.

Common mistake

Do not merely describe transport.

Learn Suggest and Predict

These commands allow a plausible answer based on knowledge or evidence.

The student should generate a defensible possibility rather than claim certainty. The practical test is whether the student can construct the required answer without a model response supplying the structure. That makes the response itself the evidence of learning.

What to do

Use the given information.
Apply course knowledge.
State a plausible outcome or reason.
Avoid overclaiming.

Worked example

Suggest why a population changed receives one plausible mechanism consistent with the data.

Common mistake

Do not treat suggest as permission to guess without evidence.

Learn Interpret and Deduce

These commands require meaning or conclusion from supplied information.

The answer should be traceable to the evidence. The practical test is whether the student can construct the required answer without a model response supplying the structure. That makes the response itself the evidence of learning.

What to do

Identify the evidence.
State the relationship.
Draw the conclusion.
Keep within what the data support.

Worked example

From a graph pattern, the student deduces that one variable is associated with another without claiming causation.

Common mistake

Do not import unsupported outside assumptions.

Build a Command-Word Comparison Table

Neighbouring verbs are easiest to learn side by side.

Direct contrast reduces command confusion. The practical test is whether the student can construct the required answer without a model response supplying the structure. That makes the response itself the evidence of learning.

What to do

Verb.
Plain-language job.
Typical evidence.
Typical mistake.

Worked example

Describe = what; explain = why; evaluate = how good/important based on criteria and evidence.

Common mistake

Do not memorise definitions of command words without practising answers.

Practise One Topic With Several Commands

Keeping content constant isolates the command-word skill.

The student can see how the same knowledge is reorganised for different tasks. The practical test is whether the student can construct the required answer without a model response supplying the structure. That makes the response itself the evidence of learning.

What to do

Choose one familiar topic.
Write define, explain, compare and evaluate questions.
Answer each briefly.
Compare structures.

Worked example

Photosynthesis is defined, explained, compared with respiration and evaluated in relation to a limiting factor investigation.

Common mistake

Do not practise each command only in a different topic.

Use Timed Command-Word Switching

Exams require rapid movement between question types.

Students need to identify the answer function without long deliberation. The practical test is whether the student can construct the required answer without a model response supplying the structure. That makes the response itself the evidence of learning.

What to do

Mix commands.
Set short time limits.
Write one-sentence plans first.
Review wrong-function errors.

Worked example

A ten-question set forces the student to switch from state to explain to calculate to justify.

Common mistake

Do not wait until the real exam to practise switching.

How the Skill Changes by Subject

English

English commonly uses analyse, compare, evaluate, explain and support. Tie every answer function to textual evidence.

Mathematics

Mathematics uses calculate, determine, show, prove, justify and sketch. The command controls how much reasoning must be visible.

Science

Science uses define, describe, explain, calculate, evaluate, suggest, predict and justify. Distinguish observation from mechanism.

Humanities

Humanities often uses describe, explain, compare, discuss, assess, evaluate and to what extent. Judgement and evidence are central.

Three Student Patterns

Maren

Maren writes excellent content but often overshoots the command and wastes time. She needs command-first planning.

Iona

Iona knows command definitions but still produces the same paragraph structure for all of them. She needs one-topic/many-command practice.

Leonie

Leonie rushes past the verb and discovers too late that she answered describe instead of evaluate. She needs a two-second command pause before writing.

The same low mark can come from different causes. One student may know the content but misread the verb; another may understand the command but lack evidence; another may have both and still fail to make a judgement under time.

A Seven-Day Implementation Cycle

Day 1: identify the answer function and complete one baseline response.
Day 2: repair structure, evidence or judgement.
Day 3: use the same command on a new topic.
Day 4: mix the skill with neighbouring command words.
Day 5: complete a short timed set.
Day 6: revisit only recurring weaknesses.
Day 7: retest after a gap without support.

The calendar can be compressed, but the cycle should preserve independent attempt, feedback, correction, transfer and delayed confirmation.

Frequently Asked Questions

Do command words mean exactly the same thing in every subject?

Not always. Learn your exam board and subject conventions while using the general definitions as a foundation.

What is the difference between describe and explain?

Describe states characteristics or patterns; explain gives reasons or mechanisms.

What is the difference between analyse and evaluate?

Analyse examines components and relationships; evaluate reaches a judgement from evidence or criteria.

What does justify mean?

Support a choice, claim or action with evidence and reasoning.

Should I memorise command-word definitions?

Know them, but also practise the answer structure each verb requires.

Can one question contain two commands?

Yes. Follow both parts explicitly.

How do marks affect command words?

Higher marks usually allow more development, evidence or judgement, but follow subject-specific guidance.

How do I practise?

Take one topic and answer it under several different command words.

How do I get faster at recognising them?

Use mixed timed question sets and write a one-line plan before answering.

How do I know I am ready?

You can identify the required answer function immediately and produce the correct structure across unfamiliar topics.

One-Page Operating Manual

Verb: Underline the command.

Translate: State the job in plain language.

Structure: Choose the answer architecture.

Evidence: Select what the command needs.

Write: Produce only the required function.

Check: Ask whether the verb was actually satisfied.

Contrast: Practise neighbouring commands together.

Mix: Switch command words under time.

Why Command and Content Must Stay Separate

A student can know a topic thoroughly and still answer the wrong question. During review, mark content errors and command-function errors separately. This prevents a low mark caused by structure from triggering unnecessary relearning of the whole topic.