Past papers are one of the most valuable resources for students preparing for the IB Diploma and IGCSE examinations. But simply completing past papers without understanding how they are marked or what the questions are actually asking can limit your progress.
The key to unlocking higher marks lies in two things: understanding the scoring criteria used by examiners and mastering the command terms that direct your answers. This guide explains both, with practical strategies you can apply immediately.
Why Past Papers Are More Than Practice
Many students treat past papers as a way to test what they know. While that is useful, the real value goes deeper.
Past papers reveal:
- The question patterns examiners repeatedly use
- The depth of answer required for different mark allocations
- The command terms that determine how you should structure your response
- The mark scheme logic that shows how marks are awarded and lost
Students who analyse past papers strategically often outperform those who simply complete them. The goal is not just to answer questions but to understand why certain answers earn marks and others do not.
What Are Command Terms and Why Do They Matter?
Command terms are the instruction words in exam questions that tell you how to answer. Words like "Explain," "Evaluate," "Describe," and "Compare" are not interchangeable. Each demands a different type of response, and using the wrong approach can cost you marks even if you understand the content.
For example:
- "Describe" asks you to paint a picture of what something is or how it works, without necessarily giving reasons.
- "Explain" requires you to give reasons, causes, or mechanisms—the "why" and "how."
- "Evaluate" demands a judgement, weighing strengths and weaknesses before reaching a conclusion.
Understanding command terms is essential because examiners design mark schemes around them. If a question says "Explain" and you only "Describe," you may receive only partial credit.
Understanding IGCSE Scoring and Command Terms
How IGCSE Grading Works
IGCSE results are reported on a grade scale from A* to G, with A* being the highest and G the lowest. Cambridge also provides a percentage uniform mark alongside the grade, which shows where a candidate's performance falls within a grade boundary.
For example:
| Grade | Percentage Uniform Mark Range |
|---|---|
| A* | 90–100 |
| A | 80–89 |
| B | 70–79 |
| C | 60–69 |
| D | 50–59 |
| E | 40–49 |
| F | 30–39 |
| G | 20–29 |
The percentage uniform mark is not the total mark achieved on the paper. It is a point on a common scale that helps universities and employers understand performance relative to the grade boundaries.
IGCSE Mark Scheme Approach
IGCSE mark schemes are typically point-based. Each question has a set number of marks, and examiners look for specific points or pieces of evidence in your answer. A 2-mark question generally requires two distinct points; a 4-mark question requires four.
This means precision matters. Adding irrelevant information will not earn marks and may even obscure the points that would have been credited.
Key IGCSE Command Terms
Cambridge International publishes a list of command words used across IGCSE syllabuses. Here are the most common and what they require:
| Command Term | What It Means |
|---|---|
| Analyse | Examine in detail to show meaning, identify elements and the relationship between them |
| Assess | Make an informed judgement |
| Calculate | Work out from given facts, figures or information |
| Comment | Give an informed opinion |
| Compare | Identify/comment on similarities and/or differences |
| Contrast | Identify/comment on differences |
| Define | Give a precise meaning |
| Describe | State the points of a topic / give characteristics and main features |
| Discuss | Write about issue(s) or topic(s) in depth in a structured way |
| Evaluate | Judge or calculate the quality, importance, amount or value of something |
| Explain | Set out purposes or reasons / make relationships clear / say why and/or how |
| Identify | Name/select/recognise |
| Justify | Support a case with evidence/argument |
| Outline | Set out the main points |
| State | Express in clear terms |
| Suggest | Apply knowledge to situations where there are a range of valid responses |
Subject-specific command terms may also appear in individual syllabuses. For example, in Mathematics, "Sketch" means to make a simple freehand drawing showing key features, while in Science, "Determine" may require explaining an experimental setup or calculating from data.
Practical Strategy for IGCSE Past Papers
- Identify the command term first. Before reading the full question, underline the command term. This tells you the type of answer required.
- Match your response length to the marks. A 2-mark question needs two clear points. A 6-mark question requires developed explanation with multiple points and evidence.
- Use the mark scheme as a learning tool. After attempting a question, compare your answer with the mark scheme. Identify which points you missed and why. Was it a knowledge gap, or did you misread the command term?
- Practise "Describe" vs "Explain" explicitly. These two are commonly confused. A "Describe" answer says what happens. An "Explain" answer says why or how it happens, often using cause-and-effect language.
- Track recurring errors. Keep a log of mistakes grouped by command term. If you consistently lose marks on "Explain" questions, focus your practice there.
For broader context on how international curricula compare with Indian boards, explore our guide on IB vs CBSE: How to Choose the Right Board for Your Child.
Understanding IB Diploma Scoring and Command Terms
How IB Diploma Scoring Works
The IB Diploma is scored out of a maximum of 45 points. Students take six subjects, each graded from 1 to 7, contributing up to 42 points. The remaining 3 points come from the core elements: Theory of Knowledge (TOK) and the Extended Essay (EE).
To earn the diploma, you must:
- Achieve at least 24 total points
- Meet CAS (Creativity, Activity, Service) requirements
- Receive a grade in all subjects, TOK, and EE
- Have no more than two grade 2s
- Have no more than three grade 3s or below
- Earn at least 12 points on HL subjects (or the three highest if taking four HL)
- Earn at least 9 points on SL subjects
The core points matrix works as follows:
| TOK A | TOK B | TOK C | TOK D | TOK E | |
|---|---|---|---|---|---|
| EE A | 3 | 3 | 2 | 2 | Failing |
| EE B | 3 | 2 | 2 | 1 | Failing |
| EE C | 2 | 2 | 1 | 0 | Failing |
| EE D | 2 | 1 | 0 | 0 | Failing |
| EE E | Failing | Failing | Failing | Failing | Failing |
This means, for example, a B in TOK and a C in EE earns 2 core points.
IB Mark Scheme Approach
IB marking differs from IGCSE in important ways:
- Level descriptors are used for extended-response questions. Examiners use a "best-fit" approach, matching your answer to the level that most closely describes it.
- Positive marking is applied: examiners look for what you have done correctly rather than penalising errors.
- Different approaches may be rewarded if they are valid and answer the question.
This means IB rewards depth, structure, and evidence-based argument more than simple point accumulation.
Key IB Command Terms by Cognitive Demand
IB command terms are often grouped by the level of thinking they require. Understanding this hierarchy helps you calibrate your answers.
Basic Recall (AO1): Define, State, List, Label, Draw, Measure
These require factual knowledge. A "State" question needs a brief, clear answer with no explanation needed. A "Define" question requires a precise meaning.
Application and Comprehension (AO2): Describe, Explain, Calculate, Identify, Outline, Distinguish
These require you to apply knowledge. "Explain" is particularly important: it demands reasons, causes, and clear relationships, not just a description.
Analysis and Evaluation (AO3): Analyse, Evaluate, Discuss, To What Extent, Justify, Compare and Contrast
These are the highest-demand command terms. They require structured arguments, multiple perspectives, evidence, and a clear conclusion.
IB Command Terms with Definitions
The following table summarises key IB command terms and what they require:
| Command Term | What It Requires |
|---|---|
| Analyse | Break down to bring out essential elements or structure |
| Compare | Give an account of similarities, referring to both throughout |
| Compare and Contrast | Give an account of both similarities and differences |
| Contrast | Give an account of differences |
| Define | Give precise meaning |
| Describe | Give a detailed account |
| Discuss | Offer a balanced review with a range of arguments; present a conclusion |
| Evaluate | Make an appraisal by weighing strengths and weaknesses; reach a judgement |
| Examine | Consider an argument to uncover assumptions and interrelationships |
| Explain | Give a detailed account including reasons or causes |
| Justify | Give valid reasons or evidence to support an answer or conclusion |
| To what extent | Consider the merits of an argument; present a clear conclusion with evidence |
Practical Strategy for IB Past Papers
- Use the 5-step method for every question: Identify the command term (underline it), check the mark allocation, understand the specific topic, plan your structure, and link back to the command term in your conclusion.
- Match answer depth to mark allocation. A 2-mark "State" question needs a brief answer. An 8–10 mark "Evaluate" question requires structured paragraphs, evidence, and a reasoned conclusion.
- For "Explain" questions, use cause-and-effect language. Show relationships: "This happens because..." or "As a result of X, Y occurs."
- For evaluative questions, cover both sides. "Discuss," "Evaluate," and "To what extent" require balanced arguments. Present multiple perspectives before reaching a judgement.
- Analyse your errors by command term. After marking your answer, ask: "Did I answer the question that was asked, or did I answer a different question?"
For a broader look at how IB compares with national curricula in terms of career preparation, read Why Parents Prefer IGCSE for Their Child's Career Growth.
Common Mistakes with Command Terms (and How to Fix Them)
Even strong students make predictable errors. Here are the most frequent, with practical fixes:
- Mistake: Describing when you should be evaluating. If a question asks you to "Evaluate" or "Discuss," simply describing what you know is not enough. You must weigh evidence, consider multiple viewpoints, and reach a conclusion. Fix: Before writing, ask yourself: "Does this command term require a judgement?" If yes, structure your answer to include both sides and a clear conclusion.
- Mistake: Listing points instead of explaining them. For "Explain" or "Analyse," a list of factors without showing how or why they matter will not earn full marks. You need to show relationships and reasoning. Fix: Use cause-and-effect language. Instead of "Factor A. Factor B. Factor C," write "Factor A leads to X because..." and "This is further influenced by Factor B, which causes..."
- Mistake: Only covering one side in "Discuss" or "Compare" questions. If the command term asks for balance, you must address both sides or all items. Fix: Before writing, plan at least two points for each side. Use a brief outline to ensure balance.
- Mistake: Writing too much for low-mark questions. A 2-mark "State" question does not need a paragraph. Over-answering wastes time and may obscure the points that earn marks. Fix: Match response length to marks. A useful rule: roughly one key point per mark for basic questions.
- Mistake: Forgetting to link back to the question. Longer answers can drift off-topic. Every paragraph should connect to the specific focus of the question. Fix: In your final sentence, directly answer what was asked. For evaluative questions, this is essential.
A Step-by-Step Past Paper Analysis Routine
Use this routine to get maximum value from every past paper you attempt:
- Step 1: Attempt under timed conditions. Simulate exam pressure to build speed and accuracy.
- Step 2: Mark your answer using the official mark scheme. Be honest about what you missed.
- Step 3: Categorise your errors. For each lost mark, note whether it was due to misunderstanding the command term, lack of knowledge, poor structure, running out of time, or a careless mistake.
- Step 4: Identify patterns. If you consistently lose marks on "Explain" or "Evaluate" questions, that is your priority for revision.
- Step 5: Rewrite one weak answer. Take a question you struggled with, study the mark scheme, and rewrite your answer to meet the criteria. This active revision is more effective than passive re-reading.
- Step 6: Track progress over time. Keep a simple log of scores and error types. Seeing improvement in specific areas builds confidence and motivation.
To build the study routine that supports this analysis, read A Guide to Effective Time Management for Students.
Quick Reference: Command Terms at a Glance
| Command Term | IGCSE Meaning | IB Meaning |
|---|---|---|
| Describe | State points / give characteristics | Give a detailed account |
| Explain | Set out reasons / why and how | Give detailed account with reasons/causes |
| Compare | Similarities and/or differences | Similarities, referring to both throughout |
| Contrast | Differences only | Differences only |
| Evaluate | Judge quality, importance, or value | Appraise strengths and weaknesses; judge |
| Discuss | Write in depth, structured | Balanced review; present conclusion |
| Analyse | Examine in detail; show relationships | Break down; bring out essential elements |
| Justify | Support with evidence/argument | Give valid reasons or evidence |
| State | Express in clear terms | Express in clear terms (brief) |
| Outline | Main points only | Brief account without detail |
Making Past Papers Work for You
Cracking IB Diploma and IGCSE past papers is not about completing as many as possible. It is about understanding how you are being assessed and what the question is actually asking.
Command terms are your roadmap. They tell you whether to describe or explain, compare or contrast, evaluate or justify. Scoring criteria show you how marks are allocated and where they are lost.
Use past papers as diagnostic tools. Analyse your errors by command term. Practise rewriting weak answers to meet the mark scheme criteria. Over time, this disciplined approach will build both your confidence and your performance.
The students who succeed are not always those who know the most content. They are often the ones who understand how to communicate what they know in the way examiners expect.
Continue Exploring
- IB vs CBSE: How to Choose the Right Board for Your Child – Understand the differences between international and national curricula.
- Why Parents Prefer IGCSE for Their Child's Career Growth – Discover how international curricula prepare students for global careers.
- A Guide to Effective Time Management for Students – Build a sustainable study routine for exam preparation.
- How to Avoid Distractions and Stay Focused While Studying – Develop concentration habits that improve performance.
- Top 5 Tips to Overcome Exam Stress and Anxiety – Manage pressure and stay calm during examinations.