GCSE command words: what they mean and how to answer each

Here's a truth that took me a while to understand watching my son go through GCSEs, and that I'll be ready for when my daughter reaches them: a huge share of the marks students drop aren't lost because they didn't know the answer. They're lost because they answered a slightly different question to the one on the paper — they described when they were asked to explain, or listed points when they were asked to evaluate. The knowledge was there. The command word wasn't read. This guide is about that one small habit that quietly rescues marks across every subject — parent to parent, and student to exam.

The one-sentence answer

Command words are the instruction verbs in a question — describe, explain, evaluate, discuss — and each one demands a specific shape of answer, so the whole game is reading the word, knowing what it's asking for, and matching your answer to it exactly.

This is the how-to companion to our full GCSE command words guide, which lists what every command word means. Here we go deeper on the handful that decide the most marks.

Why command words decide your marks

Every exam answer is marked against a mark scheme, and the mark scheme is written around the command word. "Describe" earns marks for accurate features; "explain" earns marks for linked reasons; "evaluate" earns marks for a justified judgement. Give a brilliant explanation to a "describe" question and the examiner, following the scheme, often can't reward most of it — because it isn't what the question asked for.

That's why command words punish speed. Under pressure, students read the topic ("photosynthesis", "the causes of WW1", "this source") and start writing what they know about it, skating straight over the verb that tells them how to write it. Slow down for two seconds, and you write a different, better answer.

What does "describe" mean?

Describe means say what something is like, or what happens — the features, characteristics or steps — without the reasons behind it. You're painting an accurate, detailed picture, not explaining why the picture looks that way.

"Describe the trend in the graph" wants what the line does: rises steadily to 60, then levels off. "Describe how you would carry out the experiment" wants the steps in order. A strong describe answer is specific and uses detail or figures — but it deliberately stops short of justification. The classic error is drifting into reasons the question never asked for, which burns time you needed elsewhere.

What does "explain" mean?

Explain means give the reasons, or the how and why — make the thing clear by connecting cause to effect. The signature of a real explain answer is linking language: because, therefore, this means that, which leads to.

"Explain why the rate of reaction increases" isn't answered by "the rate increases" (that's describing) — it's answered by "because the particles have more energy, so they collide more often and more successfully." It's the reasoning those links show that earns the marks, not the connective itself — so don't just sprinkle "because" around and hope. But if your explanation contains no linking words at all, it's almost certainly a description wearing an explanation's clothes.

"Describe" vs "explain" — the difference that costs the most marks

If you fix only one command-word habit, fix this pair, because they trip up more students than any other. The rule is short enough to memorise:

Describe = what. Explain = why or how.

Same topic, two different jobs. Describe the change: "the population fell sharply after 1349." Explain the change: "the population fell sharply after 1349 because the Black Death killed a large share of people, which meant fewer workers and higher wages." One states the fact; the other builds a chain of cause and effect. When you read your answer back, look for the "because" — if it isn't there and the question said explain, add it.

What does "evaluate" mean?

Evaluate means weigh up the relevant evidence, then reach a supported judgement. Depending on the subject and question that might mean arguments for and against, strengths and weaknesses, or how convincing, useful or successful something is — the question tells you what to weigh. Either way, listing points isn't the answer: the marks come from actually deciding, and saying why, using the evidence you've laid out.

The shape is: consider the sides → come to a conclusion → justify it. An evaluate answer that trails off without a verdict, or delivers a verdict with nothing behind it, leaves marks unclaimed. Because these questions carry big tariffs, they reward a plan — we cover the structure in detail in how to answer evaluate questions, and the same discipline runs through how to answer 6-mark questions.

What about "discuss", "compare" and "assess"?

A few more worth knowing, briefly:

• Discuss — develop the important points around an issue, exploring more than one view where there are competing arguments. Whether it also needs a judgement depends on the subject and mark scheme, so don't automatically treat it as another word for evaluate.
• Compare — set out relevant similarities and/or differences, ideally point by point, making direct comparisons rather than writing two separate descriptions. Many mark schemes want both similarities and differences, so give both unless the question says otherwise.
• Assess / to what extent — make a judgement about how far something is true or how important it is, weighing the evidence. Like evaluate, it wants a conclusion, not a shrug.

For the complete list across subjects, our command words guide has them all, and it's worth checking your own exam board's official list too — AQA, Edexcel and OCR each publish one, and while the meanings are broadly the same, the exact wording and which words a subject uses can differ.

How to make spotting the command word automatic

Knowing the words isn't the same as using them at 9:30am in a silent hall with the clock running. The habit that makes the difference is tiny: underline the command word before you write anything, every time, until it's automatic. Then match the shape of your answer to it.

The fastest way to bed that in is repetition on real questions — which is exactly why we built a free GCSE command words quiz: quick rounds that train you to read the verb and know instantly what it's asking for. Ten minutes on it is worth more than an hour of re-reading notes, because command-word marks are lost to habit, not to knowledge.

The bottom line

Content gets you into the room; command words decide how many marks you walk out with. A student who knows their stuff and reads the verb outscores a student who only knows their stuff — every time. It's the cheapest set of marks in the whole exam, and they're won with a two-second underline.

Reading the command word is a skill you build by practising on real questions and getting them marked — which is what Lightbulb Learning does: every topic becomes notes, flashcards, a quiz and a marked question written the way real mark schemes work, so you learn to answer the question that's actually on the paper. The first three sessions are free, no card needed.