Does Highlighting Help You Revise?

Revision Notes
Aug 2
14 min read

Updated: Aug 20

Highlighting is one of the quickest and most popular ways to revise.

You open a textbook or set of notes, choose a bright colour and mark the sentences that appear important. At the end, the page looks organised and you may feel more familiar with the topic.

However, highlighting by itself is usually not enough to prepare you for a GCSE or A-Level exam.

It can help you identify key information, but it does not require you to remember, explain or apply that information. Highlighting entire pages can also create an illusion of learning because the content looks familiar while it remains in front of you.

The strongest way to use highlighting is as a short preparation step.

Highlight a small number of essential points, turn them into questions and then close the page. Test whether you can retrieve and use the information without looking.

This guide explains when highlighting can be useful, why students often overestimate how much they have learned and which active revision techniques work better than colouring whole pages.

Does Highlighting Actually Work for Revision?

Highlighting can be useful when it helps you:

Identify essential information
Separate key terms from examples
Locate important evidence
Organise a difficult page
Notice connections
Prepare retrieval questions
Find information quickly during later review

However, highlighting does not automatically strengthen your memory.

The act of moving a pen across a sentence requires very little retrieval or decision-making, particularly when large amounts of the page are marked.

A highlighted passage only becomes a useful revision resource when you do something active with it afterwards.

For example:

Read one small section.
Highlight the essential ideas.
Turn each point into a question.
Close the notes.
Answer the questions from memory.
Check and correct your answers.
Apply the knowledge in an exam question.

Highlighting can support revision, but it should not become the whole revision method.

It is best used alongside The Best Revision Techniques for GCSEs and A-Levels.

Why Does Highlighting Feel Effective?

Highlighting provides an immediate sense of progress.

You can see:

Which pages you have covered
Which sentences appear important
How much work you have completed
Which topics you have reviewed

The activity also feels relatively easy.

Unlike practice questions or closed-book recall, highlighting does not force you to confront what you have forgotten.

This can make it feel comfortable and productive.

Unfortunately, feeling productive is not the same as learning effectively.

The Illusion of Learning

An illusion of learning happens when information feels familiar, so you assume you know it.

You may reread a highlighted sentence and think:

I recognise this, so I must remember it.

However, recognition is different from recall.

Recognition means the answer looks familiar when it is in front of you.

Recall means you can produce the answer without looking.

In most GCSE and A-Level exams, you need to recall and apply information independently.

You may recognise the definition of osmosis on a highlighted page but struggle to write it accurately in the exam.

You may recognise a quotation from Macbeth but be unable to produce it when answering an essay question.

You may recognise the stages of a psychological study without remembering the findings or evaluation.

Highlighting can therefore make a topic feel more secure than it really is.

How Can You Test Whether You Actually Know the Content?

After highlighting a section:

Close the book or webpage.
Write down the main points.
Define the key terms.
Explain the topic aloud.
Complete a relevant question.
Check what you missed.

This gives you evidence of what you have learned.

Read Retrieval Practice Explained for a full guide to closed-book recall and self-quizzing.

Highlighting vs Active Revision

Highlighting is mainly an information-selection activity.

Active revision requires you to retrieve, process or apply the information.

Highlighting

You identify information while it remains visible.

Retrieval practice

You close the notes and attempt to remember it.

Practice questions

You select and apply the information in the form required by the exam.

Predicted papers

You retrieve knowledge from across the course under realistic, timed conditions.

Highlighting can help you decide what to learn, but active tasks help you learn it.

When Can Highlighting Be Useful?

Highlighting may be useful during the first stage of reviewing unfamiliar or disorganised material.

For example, you could use it to identify:

Definitions
Formulae
Dates
Quotations
Key examples
Causes
Consequences
Research findings
Evaluation points
Command words
Common mistakes

It can also help you condense class notes before turning them into a more active revision resource.

Read How to Make Effective Revision Notes for help selecting and organising important content.

Highlighting Should Have a Clear Purpose

Before using a highlighter, decide what you are looking for.

For example:

Essential terminology
Evidence supporting an argument
Steps in a process
A writer’s methods
Formulae and units
Dates and events
Strengths and limitations
Information you previously forgot

Without a clear purpose, students often highlight anything that appears vaguely important.

The page gradually becomes a block of colour.

How Much Should You Highlight?

There is no exact percentage, but highlighting should be selective.

If most of the page is coloured, the highlighting is no longer showing what matters most.

A useful test is:

Would I still understand why this sentence was selected if I returned next week?

Try to highlight:

Short phrases
Essential terms
Key evidence
Important stages
Brief definitions

Avoid colouring whole paragraphs unless every sentence is genuinely essential.

Highlight Keywords Rather Than Complete Sentences

Suppose your notes say:

Normative social influence occurs when a person conforms because they want to gain social approval or avoid rejection from the group.

You might highlight:

Normative social influence
Social approval
Avoid rejection

These terms act as retrieval prompts.

You can then cover the sentence and reconstruct the full explanation.

Highlighting the entire sentence makes it easier to reread passively.

Use the One-Sentence Test

After reading a paragraph, ask:

What is the one idea I need to remember?

Highlight only the phrase that captures that idea.

For example, a long paragraph on diffusion may contain examples and additional detail.

The essential point may be:

Net movement from higher to lower concentration.

You can then create separate questions about factors affecting the rate and biological examples.

Use a Limited Colour System

Colour can help organise information when each colour has a consistent purpose.

For example:

Yellow: key knowledge
Green: examples or evidence
Pink: evaluation
Blue: formulae or methods

Keep the system simple.

If every type of information has a different colour, you may spend more time choosing pens than learning the content.

Avoid Colour Coding Without Meaning

Using several colours does not automatically make notes easier to remember.

Colour becomes decorative when:

Colours are chosen randomly
Every sentence has a different shade
The system changes from page to page
You cannot remember what each colour means
Presentation takes longer than revision
The colours make the page harder to read

The purpose of colour is to clarify the content.

It should not become the main task.

Highlighting Definitions

Definitions are suitable for selective highlighting because precise terminology may be important in an exam.

For example:

Opportunity cost is the value of the next best alternative given up when a choice is made.

Highlight the term and the essential wording.

Then turn it into a question:

What is opportunity cost?

Close the notes and attempt the complete answer.

Highlighting Formulae

Highlighting can help formulae stand out in a page of notes.

However, you should then test whether you can:

Recall the formula
Explain each symbol
State the units
Rearrange it
Choose it for the correct question
Apply it accurately

For example:

Density = mass ÷ volume

After highlighting it, close the page and complete calculations.

Highlighting Quotations

Students may highlight quotations in a text or set of notes.

Use highlighting selectively.

Choose short quotations that:

Support several themes
Contain useful methods
Show character development
Can be remembered accurately
Are likely to support different questions

Then turn them into retrieval prompts.

For example:

Which quotation presents Macbeth’s uncontrolled ambition?

Do not rely on recognising the quotation when it is highlighted on the page.

Highlighting Evidence in Essay Subjects

In History, Psychology, Sociology, Politics and Law, you might highlight:

Named studies
Key findings
Dates
Legal cases
Examples
Arguments
Counterarguments

The highlighted evidence should be connected to its purpose.

Ask:

What does this evidence support?
Which argument does it challenge?
How could I use it in an answer?
What limitation does it demonstrate?

A name or date without an explanation is unlikely to strengthen an essay.

Highlighting Command Words

Highlighting command words in practice questions can improve exam technique.

For example:

Describe
Explain
Compare
Analyse
Assess
Evaluate

You could also underline:

The number of examples required
The topic
The scenario
The time period
The instruction to use a source

This is different from highlighting revision notes.

In an exam question, highlighting can help you identify what the task requires.

Read How to Revise Exam Technique for more guidance on interpreting questions.

How to Turn Highlighted Points into Questions

Turning highlighted information into questions is one of the best ways to make the activity more active.

Each highlighted point should create a prompt.

For example:

Highlighted point

Insulin reduces blood-glucose concentration.

Retrieval questions

Which hormone lowers blood-glucose concentration?
Where is insulin produced?
What causes insulin to be released?
How does insulin lower blood-glucose concentration?
What happens to excess glucose?

The original sentence becomes the starting point for deeper recall.

Create Questions in the Margin

Write a short question beside each highlighted section.

For example:

Highlighted information	Margin question
Causes of the Wall Street Crash	What caused the Wall Street Crash?
Normative social influence	Why does normative influence lead to conformity?
Price elasticity formula	How is price elasticity of demand calculated?
Macbeth quotation	How does this quotation present ambition?

When revising, cover the main text and answer the margin questions.

Use Question Headings

Instead of highlighting a section under the heading:

The multi-store model

rewrite the heading as:

How does the multi-store model explain memory?

This encourages you to produce a connected explanation rather than recognise isolated words.

Turn Highlighted Lists into Flashcards

Short, testable points can become flashcards.

For example:

Front: What factors increase the rate of diffusion?

Back:

A steeper concentration gradient
A higher temperature
A larger surface area
A shorter diffusion distance

Read How to Use Flashcards Properly before converting every highlighted sentence into a card.

Not all information belongs on a flashcard.

Turn Highlighted Processes into Blank Flowcharts

If you highlight the stages of a process, create a blank version.

For example:

Temperature rises → ______ detects the change → ______ coordinates a response → sweating and vasodilation → increased heat loss

Complete the missing stages from memory.

This combines highlighting with Dual Coding: How to Combine Words and Pictures.

Turn Highlighted Comparisons into Tables

Suppose you highlight differences between mitosis and meiosis.

Create an empty comparison table:

Feature	Mitosis	Meiosis
Number of divisions
Cells produced
Genetic similarity
Chromosome number
Purpose

Complete it without notes.

Turning Highlighted Content into a Brain Dump

After highlighting a topic:

Put the source away.
Write the topic title on a blank page.
Add everything you remember.
Include highlighted definitions, examples and stages.
Check against the source.
Correct omissions in another colour.

Read The Blurting Revision Method Explained for a complete brain-dump process.

Combining Highlighting with Retrieval Practice

Highlighting should usually come before retrieval, not instead of it.

A useful sequence is:

Read a small section.
Highlight only the key points.
Turn them into questions.
Close the notes.
Answer from memory.
Check carefully.
Correct omissions.
Repeat after several days.

The retrieval stage shows whether the highlighting helped you identify the right information.

Closed-Book Recall After Highlighting

Try this simple activity.

Step 1

Read one page and highlight no more than the essential terms and ideas.

Step 2

Close the page.

Step 3

Write the highlighted terms from memory.

Step 4

Use each term in a complete explanation.

Step 5

Check whether anything important was missing.

This prevents you from memorising disconnected keywords without understanding them.

Explain Highlighted Terms Aloud

Choose one highlighted term and explain:

What it means
How it works
Why it matters
Which example supports it
How it connects to the wider topic

If you cannot explain the term, return to the notes.

Use The Feynman Technique for Students to turn technical wording into clear understanding.

Repeat the Retrieval After a Gap

A successful test immediately after highlighting does not guarantee long-term recall.

Test yourself again:

The next day
Three days later
One week later
During mixed practice
In a past or predicted paper

This combines highlighting with Spaced Practice: Why Spacing Out Revision Works.

Better Alternatives to Highlighting Entire Pages

When you find yourself colouring most of the page, stop and choose a more active technique.

Better alternatives include:

Writing a short summary
Creating retrieval questions
Completing a brain dump
Making focused flashcards
Drawing a diagram
Creating a comparison table
Explaining the topic aloud
Planning an essay
Completing practice questions
Marking and correcting an answer

These activities require more thinking than highlighting alone.

Create a Summary Box

After reading a section, close it and write:

The three most important ideas
Two examples
One common mistake
One possible exam question

This is more selective than colouring several paragraphs.

Use the Three-Question Method

After each page, write three questions:

What is the central idea?
Which detail is most likely to be forgotten?
How could this appear in an exam?

Then answer them without looking.

Create a One-Page Topic Sheet

Instead of highlighting a long chapter, condense it into:

Key definitions
Main processes
Essential examples
One diagram
Common mistakes
Retrieval questions
Exam links

The website’s free GCSE and A-Level revision notes provide a ready-made, course-specific starting point, allowing you to spend less time marking textbooks and more time actively testing the content.

Read How to Make Effective Revision Notes for a complete note-making process.

Use a Comparison Grid

Comparison grids are often more useful than several differently coloured paragraphs.

For example:

Feature	Ionic bonding	Covalent bonding	Metallic bonding
Particles involved
Electron behaviour
Structure
Melting point
Conductivity

Complete the table from memory.

Use a Timeline

For historical or chronological content, create a timeline instead of highlighting dates across several pages.

Include:

Key events
Causes
Consequences
Turning points
Links between developments

Then recreate it from memory.

Use a Flowchart

For processes, convert the notes into a sequence.

For example:

Interest rates rise → borrowing becomes more expensive → consumption and investment may fall → aggregate demand falls → inflationary pressure may decrease

Cover parts of the chain and complete them independently.

Use Practice Questions

Questions provide much stronger evidence of learning than highlighted pages.

After reviewing a topic, complete:

A definition question
A short explanation
An application question
A calculation
A comparison
An extended response

Read Why Practice Questions Are Essential for Revision.

Is Highlighting Better Than Rewriting Notes?

Neither method is automatically effective.

Highlighting may help you select information.

Rewriting may help you summarise or reorganise it.

Both become passive when you:

Copy without thinking
Keep the source visible
Never test yourself
Avoid practice questions
Focus on presentation

Whichever method you use, move towards recall and application.

Read Is Rewriting Notes a Good Revision Method? for a fuller comparison.

Highlighting for GCSE Science

Highlight:

Definitions
Formulae
Units
Process stages
Required practical variables
Common misconceptions

Then:

Draw diagrams from memory
Complete calculations
Answer practical questions
Apply the content to unfamiliar scenarios

Do not highlight every scientific example.

Select those that help explain the required concept.

Highlighting for GCSE Maths

Highlighting has a limited role in Maths.

You might highlight:

Formulae
Rules
Units
Steps in a method
Common errors

However, most revision time should involve solving problems.

A highlighted worked example can show the method, but you should then close it and attempt a different question.

Highlighting for GCSE English Literature

Highlight:

Short quotations
Writer’s methods
Important changes
Theme links
Context that supports interpretation

Avoid highlighting entire speeches or every quotation involving a character.

Choose flexible evidence that could support several questions.

Then test whether you can retrieve and analyse it.

Highlighting for GCSE English Language

Highlighting can be useful when annotating an unfamiliar extract.

Use it to identify:

Language methods
Structural shifts
Contrasts
Repeated ideas
Changes in tone
Evidence for a response

During revision, practise deciding which details are relevant to a particular question.

Do not highlight the entire extract.

Highlighting for History

Use selective highlighting for:

Dates
Events
Causes
Consequences
Evidence
Interpretations
Turning points

Then create a timeline, cause-and-effect chain or essay plan.

The highlighted information must be organised into an argument.

Highlighting for Geography

Highlight:

Case-study evidence
Locations
Processes
Causes
Effects
Management strategies
Key data

Turn the points into:

Diagrams
Maps
Case-study questions
Comparison grids
Exam responses

Highlighting for Modern Languages

Highlighting may help identify:

New vocabulary
Verb forms
Tenses
Sentence structures
Connectives
Common errors

Then test yourself through:

Translation
Flashcards
Speaking
Sentence creation
Timed writing

Recognising a highlighted word is not the same as producing it independently.

Highlighting for A-Level Psychology and Sociology

Highlight selectively:

Key concepts
Researchers
Findings
Supporting evidence
Evaluation points
Application examples

Use a consistent system, such as:

One colour for description
One for evidence
One for evaluation

Then cover the notes and create an essay plan or brain dump.

Highlighting for A-Level Politics and History

Highlight:

Arguments
Examples
Dates
Evidence
Counterarguments
Judgements

Do not treat every example as equally important.

Choose evidence that directly supports a possible debate or essay question.

Highlighting for A-Level Business and Economics

Highlight:

Definitions
Formulae
Causes
Consequences
Chains of analysis
Contextual examples
Evaluation conditions

Then apply the content to case studies and data-response questions.

A highlighted advantage or disadvantage is not useful unless you can explain when and why it matters.

Highlighting for A-Level Law

Highlight:

Legal principles
Cases
Statutes
Elements of offences
Defences
Exceptions

Then apply them to scenarios.

Recognising a case name is not enough. You need to know the legal principle and how it affects the facts of the question.

Common Highlighting Mistakes

Highlighting Before Reading the Whole Section

Read the section first.

You need to understand the overall meaning before deciding what is most important.

Highlighting Too Much

If most of the page is coloured, nothing stands out.

Highlighting Complete Paragraphs

Select essential phrases and terms.

Using Too Many Colours

Keep the system simple and consistent.

Highlighting Without a Purpose

Decide what type of information you are identifying.

Never Returning to the Page

Turn highlighted points into questions and revisit them.

Rereading the Highlighted Parts Repeatedly

Close the page and retrieve the content.

Assuming Familiarity Means Knowledge

Test yourself without notes.

Spending Too Long Colour Coding

Revision should not become a stationery project.

Highlighting Instead of Answering Questions

Move quickly from content review to exam practice.

Highlighting Information Outside the Specification

Use the correct course checklist to identify examinable content.

Colouring Weak Topics Without Fixing Them

Use the highlighted gap to create a specific revision task.

How to Use Highlighting After a Mock Exam

After reviewing a mock or predicted paper, you could highlight:

Knowledge you forgot
Terminology missing from answers
Command words you misread
Mark-scheme points you overlooked
Repeated mistakes

Use a different colour for each type only when the distinction is helpful.

Then turn the highlighted issues into actions.

For example:

Highlighted issue	Revision action
Missing definition	Create and test a flashcard
Weak explanation	Use the Feynman technique
Application missing	Complete scenario questions
Formula forgotten	Recall and practise calculations
Evaluation undeveloped	Write timed evaluation paragraphs
Timing problem	Complete a timed section

Using Predicted Papers to Test Highlighted Knowledge

Highlighting may help you identify important information during topic revision.

A full paper tests whether that information can be recalled and used without the page in front of you.

Our GCSE and A-Level predicted papers are one of the best ways to test whether highlighted content has become secure exam knowledge.

They require you to:

Recognise the topic
Retrieve the correct information
Select relevant details
Apply knowledge
Use command words
Manage time
Move between different question types

This is a much stronger test than rereading a highlighted textbook.

Use Predicted Papers Diagnostically

After completing a predicted paper, ask:

Did I remember the highlighted definitions?
Could I apply them?
Did I recall the examples?
Did I select relevant evidence?
Did I confuse similar topics?
Did I use enough detail?
Did I recognise the command word?

Return to the notes only for the gaps identified by the paper.

Read How to Use a Predicted Paper to Revise for a complete diagnostic process.

A 30-Minute Highlighting and Retrieval Session

Five minutes: Read

Choose one small section and read it carefully.

Five minutes: Highlight selectively

Mark only essential terms, evidence or stages.

Five minutes: Create questions

Turn each highlighted point into a retrieval prompt.

Five minutes: Close and recall

Answer the questions without notes.

Five minutes: Check

Correct missing or inaccurate answers.

Five minutes: Apply

Complete one short exam question.

Schedule another retrieval attempt later in the week.

Selective Highlighting Checklist

Before finishing, check that:

You read the section before highlighting
You had a clear purpose
Only essential information was selected
The majority of the page remains uncoloured
Each colour has a consistent meaning
You highlighted phrases rather than whole paragraphs
You turned points into questions
You closed the notes and tested yourself
You checked your recall accurately
You completed a relevant exam question
You scheduled another review
You plan to test the topic in a full paper

Does Highlighting Help You Revise? Final Advice

Highlighting can help you identify and organise important information, but it is not usually enough on its own.

It can create an illusion of learning because highlighted content becomes familiar while it remains visible.

To use highlighting effectively:

Read the section first.
Decide what type of information you need.
Highlight only essential terms and ideas.
Turn those points into questions.
Close the notes.
Retrieve the answers from memory.
Check and correct your response.
Complete relevant exam questions.
Revisit the topic after a gap.

Avoid colouring entire pages.

When almost everything is highlighted, the most important information no longer stands out and the activity becomes another form of passive rereading.

Better alternatives include brain dumps, flashcards, diagrams, comparison tables, explanations and practice questions.

Start with the website’s free GCSE and A-Level revision notes, identify the key knowledge and spend most of your time actively retrieving and applying it.

As your exams approach, complete one of our GCSE or A-Level predicted papers. This will show whether you can remember and use the information without the bright colours and familiar page in front of you.

Highlighting can point you towards what matters.

Active revision is what helps you remember it. 🖍️