How to Get an A* in IGCSE Physics

Achieving an A* in IGCSE Physics shows a high level of scientific thinking. It means you can not only recall information, but also apply physics principles to unfamiliar situations, explain your reasoning clearly, and solve problems under exam pressure.

I know from nearly three decades of teaching physics that students who reach this grade have a clear plan. They work consistently, build understanding through practice, and know exactly what examiners expect.

This guide explains what high‑performing students do differently - and how you can use the same strategies to reach the top grade.

Key Takeaways

• Understand your exam board’s specification thoroughly. A* candidates master not only the core content but also the harder Extended topics.

• Aim for understanding rather than memorisation. Examiners reward students who can apply physics principles to unfamiliar situations.

• Use past papers early and regularly. Review mark schemes closely to see what examiners want. 

• Develop accuracy in technical language, calculations, graphs, and explanations. These are often the differentiators between A and A* performance.

Understanding IGCSE Physics Grade Boundaries

Most students aiming for top grades sit either Cambridge (CAIE) or Edexcel International GCSE Physics. Some schools also use OxfordAQA. These boards use slightly different grading systems:

What grades can you achieve?

• Cambridge IGCSE may use A*–G or 9–1, depending on syllabus code.

• Edexcel International GCSE uses 9–1 only.

• OxfordAQA International GCSE also uses 9–1.

Where do grade boundaries sit?

• Cambridge A* typically sits around 90%, but this varies each year based on difficulty.

• Edexcel has similar boundary patterns, though exact values differ per sitting.

• Boundaries are always set after the exam series and change yearly.

For the latest grade boundaries:

• Check your board’s official post-series document.

• Use Save My Exams summaries as a quick reference.

This is summarised in the table below:

Knowing your board ensures you revise the correct structure, equations, and style of questions.

Know Your Exam Board Requirements

IGCSE Physics providers in the UK and internationally are Cambridge Assessment International Education (CAIE), Pearson Edexcel, and Oxford AQA. While they cover similar content, their assessment structures differ in important ways:

Cambridge (CAIE) (opens in a new tab)

You will sit:

• A multiple‑choice paper (Extended)

• A theory paper (Extended)

• Either a Practical Test or an Alternative to Practical (ATP)

Additional note:

• Extended tier students can achieve A*–G or 9–1 depending on syllabus code. 

Edexcel (opens in a new tab)

You will sit

• Paper 1 and Paper 2

Additional notes:

• Both test practical skills through written questions - no separate practical exam.

• Graded 9–1 only.

OxfordAQA (opens in a new tab)

You will sit:

• Paper 1 and Paper 2

Additional notes:

• Both test practical skills through written questions - no separate practical exam.

• Graded 9–1 only.

Effective Revision Strategies for IGCSE Physics

Physics is a subject that rewards structured, active revision. These methods consistently help students reach the A* boundary.

Active Recall and Spaced Repetition

Active recall means testing yourself on material rather than passively re-reading your notes.

For example:

• Re-derive equations from memory.

• Cover diagrams and redraw them.

• Test yourself using flashcards (SaveMyExams flashcards are useful for this.)

Spaced repetition helps transfer knowledge into long-term memory.

Practise Past Papers Regularly

Past papers are the single most effective revision tool for IGCSE Physics. They expose you to real exam language, the range of contexts questions can appear in, and the level of detail examiners expect in responses. 

I always encourage students to begin timed past paper practice earlier than feels comfortable - waiting until two weeks before the exam leaves too little time to act on what you learn.

Past papers teach you how your board phrases questions.

After completing one, study the mark scheme:

• Note exact wording required.

• Watch for ‘explain’ vs ‘describe’.

• Identify common misconceptions.

Students who start this early make the most progress.

SaveMyExams organises past papers by topic and year, making practice easier.

Focus on Key Practical and Mathematical Skills

IGCSE Physics is not purely a written subject and requires practical and mathematical skills

Practical skills like: 

• planning experiments, 

• recording data accurately, 

• identifying sources of error, and 

• suggesting improvements 

are assessed directly, either through a timed practical exam or the Alternative to Practical paper. 

Alongside practical work, fluent mathematical handling is essential. This means being comfortable:

• rearranging equations, 

• working in standard form, 

• converting units correctly, and 

• applying the right formula without prompting. 

Practising these skills separately, before applying them in full exam questions, builds the confidence and accuracy the A* requires.

Focus on Understanding, Not Just Memorising

One of the clearest differences between an A and an A* in physics is the ability to explain why, not just what. A student who has memorised that resistance increases with temperature in a metal wire due to increased lattice vibration impeding electron flow, and then applies that understanding to an unfamiliar circuit, is likely to gain full marks.

Build understanding by asking yourself explanatory questions as you revise: 

• Why does this happen? 

• What would change if this variable were different? 

• How does this connect to what I know about other physics topics? 

Save My Exams revision notes for IGCSE Physics are written to support conceptual understanding, not just content coverage.

Practise Core Subject Skills

Several skills recur throughout IGCSE Physics and reward focused, deliberate practice:

• Equation manipulation: Be able to rearrange any equation in the specification. Practise writing full working, including units, in every calculation.

• Significant figures and standard form: Know when to round appropriately and how to express very large or very small quantities.

• Graph drawing and analysis: Be able to plot accurately, draw best-fit lines, calculate gradients with correct units, and interpret the physical meaning of slopes and intercepts.

• Describing relationships: Use accurate language - 'directly proportional,' 'inversely proportional,' 'linear but not proportional' - supported by reference to the data or graph in front of you.

Developing IGCSE Physics Exam Technique

Understanding the content is necessary, and the way you communicate your knowledge in the exam determines the marks you receive. These technique points are where well-prepared students often pick up or lose the final marks that separate grades.

Extended Response Questions

IGCSE Physics papers include longer-mark questions - typically worth 4 to 6 marks - that require structured, detailed responses. These questions reward students who:

• write in a logical sequence, 

• make their reasoning explicit, and 

• use accurate scientific language throughout.

A reliable approach for these questions is to plan your answer briefly before writing, identify the key physics principle involved, and then build your explanation in a clear chain: 

cause → mechanism → consequence → equation (if relevant)

Examiners mark positively, meaning they award marks for each valid point present, so include more detail rather than less.

Provide Sufficient Depth in Explanations

The most common reason capable students miss the top grade is not a lack of knowledge - it is an incomplete explanation of high-scoring questions. An answer that identifies the correct phenomenon but stops short of explaining the underlying physics will receive credit, but not full credit.

When you practise mark schemes, notice how often full marks require one more step of reasoning than students typically provide. Train yourself to ask 'why?' one additional time before you finish writing. 

A student who writes 'the current decreases' when the question asks them to explain what happens has answered only half the question; a student who adds 'because resistance has increased, so by V = IR the current is smaller for the same voltage' has answered it fully.

Learn Key Definitions Precisely

Physics definitions are not paraphrases - they are technical statements where specific words carry specific meaning. 

The definition of pressure as force per unit area acting perpendicularly to a surface, for example, includes three components, any one of which might be the difference between gaining or losing a mark.

Build a glossary of all key definitions from your specification and test yourself on them using exact wording. Pay particular attention to definitions for quantities that are easily confused, such as speed versus velocity, mass versus weight, or resistance versus resistivity.

Interpreting Graphs, Data, and Diagrams

Data interpretation is one of the skills that most reliably distinguishes A* candidates. 

Questions in this style present you with a graph, table, or set of experimental results and ask you to extract information, identify patterns, calculate values, or evaluate the quality of the data.

Practise the following skills systematically:

• Reading values from graphs accurately, including from best-fit lines rather than individual data points.

• Calculating the gradient of a straight-line graph, including identifying the correct units for that gradient.

• Identifying anomalous data points and explaining why they might have occurred.

• Drawing conclusions from data that are supported by the numbers, not just general knowledge.

These skills appear in every exam session, no matter the exam board.

Frequently Asked Questions

What percentage do you need to get an A* in IGCSE Physics?

It varies by exam series, but Cambridge Extended usually places A* around 88–92%, depending on difficulty.

Edexcel follows a similar pattern.

Always check the official document for your exam series.

Is it hard to get an A* in IGCSE Physics?

It requires consistent effort, but it is absolutely achievable with:

• Solid understanding

• Regular practice

• Accurate exam technique

• Confidence with the style of your exam board

Do I need to memorise all equations for IGCSE Physics?

It depends on your exam board:

• Cambridge (CAIE): Yes. Cambridge does not provide an equation sheet, so you must memorise all formulae.

• Edexcel International GCSE (4PH1): No. Edexcel provides an official equation list with every exam paper, so memorisation is not required.

• OxfordAQA International GCSE: No.OxfordAQA also provides an equation sheet as part of the exam materials.

However, even for boards that do give an equation sheet, you should still practise using the equations frequently - you will work faster and more confidently in the exam.

Final Thoughts

Achieving an A* in IGCSE Physics comes down to three things working together: 

• strong content knowledge, 

• deep conceptual understanding, and 

• precise, practised exam technique. 

None of these develops overnight, but all of them are within reach with a structured approach and consistent effort over your course.

Start with your specification, build your revision around active recall and past paper practice, and always ask yourself whether your written answers reflect the depth of understanding examiners are looking for. 

Physics rewards clarity of reasoning - students who can think carefully and communicate accurately are the ones who attain the highest grades.

If you are looking for a place to start, Save My Exams IGCSE Physics resources brings together revision notes, exam questions, flashcards, and past papers in one place. Use them as part of a broader revision plan, and approach each session with a specific goal in mind. 

The A* is achievable - and the habits you build earning it will serve you well beyond IGCSE.

References.

• Cambridge IGCSE Physics (0625) (opens in a new tab)

• Edexcel International GCSE Physics (2017) | Pearson qualifications (opens in a new tab)

• Oxford AQA (2016). International GCSE Physics (9203) (opens in a new tab)

• Metacognition and Self-Regulated Learning | EEF (opens in a new tab)