Wednesday, 9 September 2026

Is Your Child Revising — or Merely Looking at Their Notes

Is Your Child Revising — or Merely Looking at Their Notes?

Time spent revising and learning achieved are not necessarily proportional.

There is a reassuring sight familiar to many parents during the months leading up to examinations.

A child is sitting at a desk.

The textbook is open. There are several exercise books spread around. Perhaps there are some coloured highlighters, beautifully written revision cards and a laptop showing a presentation from school.

They have been sitting there for two hours.

Surely that must mean they have been revising?

Possibly.

But there is another possibility.

They may simply have spent two hours looking at things they already recognise.

And recognition is not the same as recall.

That distinction is one of the most important things students can understand about revision.

A student can spend hours rereading a chapter and come away with the comforting feeling that they "know it". Yet when the book is closed and an examination question appears asking them to explain the process, perform the calculation or apply the idea in an unfamiliar situation, the knowledge suddenly seems much less secure.

Effective revision is not primarily about how long somebody sits at a desk.

It is about what their brain has been required to do while they are there.

Why Rereading Feels So Effective

Rereading is attractive because it is comfortable.

Suppose a Biology student reads:

"Insulin is produced by the pancreas and causes blood glucose concentration to decrease."

They read it once.

Then again.

By the third reading it looks extremely familiar.

The student thinks:

"Yes, I know this."

But familiarity can be deceptive.

Close the book and ask:

Which organ produces insulin?
What stimulates its release?
What effect does insulin have on liver cells?
How is this part of a negative feedback system?

Suddenly the student may discover that recognising the paragraph was much easier than reconstructing the knowledge independently.

The same thing happens in almost every subject.

A Physics equation looks obvious when it is printed underneath the example.

A Maths solution looks straightforward when somebody else has already completed the algebra.

A Chemistry mechanism seems completely logical when all the arrows have already been drawn.

But the examination does not normally ask:

"Does this answer look familiar?"

It asks:

"Can you produce the answer yourself?"

That is a very different mental task.

Highlighting Can Be Useful — But It Is Not Revision by Itself

I have nothing against highlighters.

Used properly, highlighting can help identify:

important vocabulary;
definitions;
equations;
dates;
key evidence;
command words;
relationships between ideas.

The problem begins when colouring the page becomes the objective.

I have seen revision notes where almost every sentence has been highlighted.

At that point the highlighter has stopped identifying important information because everything has apparently become important.

There is also a psychological trap.

Highlighting feels productive.

You begin with an ordinary page and finish with a colourful page.

Something has visibly changed.

Unfortunately, the important question is not:

"Have my notes changed?"

It is:

"Has my memory changed?"

That is much harder to see.

Retrieval Practice: Close the Book

One of the simplest improvements a student can make is also one of the most uncomfortable.

Close the book.

Then try to remember.

This is retrieval practice.

Instead of repeatedly putting information into the brain, the student practises getting information back out.

For example, after studying photosynthesis, close everything and write:

Everything I can remember about photosynthesis.

Perhaps the student writes:

Photosynthesis happens in chloroplasts.

It needs light.

It uses carbon dioxide and water.

It produces glucose and oxygen.

Then they might try the equation:

carbon dioxide + water -> glucose + oxygen

Then ask:

What happens to the glucose?
Why does light intensity affect the rate?
Why does carbon dioxide concentration affect the rate?
How could the rate be measured experimentally?
What eventually becomes the limiting factor?

Only after attempting the answers should the student reopen the book.

Now something very valuable happens.

They can see exactly what they did not know.

That gap is where the next piece of revision should be concentrated.

The Blank-Paper Test

A particularly simple version of retrieval practice requires almost no equipment.

Take a blank sheet of paper.

Write the topic at the top.

For example:

Electromagnetic Spectrum

Now, without looking at anything else, write everything you can remember.

Perhaps:

radio waves
microwaves
infrared
visible light
ultraviolet
X-rays
gamma rays

Then continue.

Which has the longest wavelength?

Which has the highest frequency?

What are their uses?

What are their dangers?

How are they produced?

What happens to frequency as wavelength decreases?

Only after exhausting your memory should you look at your notes.

Use a different pen to add everything you missed.

That second colour is particularly useful because it shows the student exactly where the weaknesses lie.

Do the exercise again several days later.

If fewer additions are required, learning has occurred.

Maths and Physics Need Calculation Practice

There is an additional problem in mathematical subjects.

You cannot learn to calculate simply by reading somebody else's calculations.

Imagine trying to learn tennis by watching somebody serve.

Watching an expert may help you understand the movement.

But eventually you have to pick up the racket.

The same principle applies to Maths and Physics.

Suppose a student is revising kinetic energy.

They might know:

KE = 0.5 x m x v^2

That is useful.

But examination questions may require them to:

calculate kinetic energy;
rearrange the equation;
calculate velocity;
convert grams into kilograms;
interpret information from a graph;
combine the equation with another part of the question;
explain what happens when velocity doubles.

Knowing the equation is only the starting point.

For example, if velocity doubles:

KE = 0.5 x m x v^2

The velocity is squared.

So doubling velocity gives:

2^2 = 4

The kinetic energy becomes four times as large, assuming the mass remains unchanged.

That understanding becomes much more secure when a student has actually used the equation repeatedly.

Past-Paper Questions Reveal What You Really Know

Past-paper questions are among the most useful revision tools available.

But even these can be used badly.

Some students answer a question, look at the mark scheme and think:

"Yes, that's basically what I meant."

That can be dangerous.

The examination does not award marks for what the student meant.

It awards marks for what they wrote.

A better process is:

Attempt the question without help.
Mark it carefully.
Identify exactly why each mark was lost.
Correct the answer.
Try a similar question later.

The fourth and fifth stages matter enormously.

Simply looking at the correct answer does not necessarily correct the underlying problem.

Keep a Mistake Log

One of the most useful revision documents a student can create is not a set of perfect notes.

It is a record of their mistakes.

For example:

Topic	Mistake	Why I lost the mark	What I must remember
Density	Forgot units	Answer incomplete	Always give kg/m^3 or g/cm^3
Genetics	Confused genotype and phenotype	Vocabulary weak	Genotype = alleles, phenotype = characteristic
Algebra	Expanded bracket incorrectly	Sign error	Check negative multiplication
Physics	Used diameter instead of radius	Misread diagram	Mark radius before calculating
Chemistry	Said molecules instead of ions	Incorrect particle terminology	Ionic compounds contain ions

This turns mistakes into useful information.

A student who never analyses errors may keep practising the same mistake.

A student who studies their errors starts removing them.

Explain It Aloud

There is another excellent test:

Teach the topic to somebody else.

The other person does not even need to understand the subject.

Explain:

how a transformer works;
why plants grow towards light;
what natural selection means;
how electrolysis works;
why increasing temperature increases reaction rate;
how simultaneous equations are solved.

If the explanation becomes:

"You know... it's the thing where... well, basically..."

then the student has discovered an area that needs more work.

Being able to recognise a textbook explanation is one level of understanding.

Being able to explain the idea clearly without the textbook is much stronger evidence that the knowledge is secure.

I frequently find that asking a student the apparently simple question "Why?" reveals far more than asking whether they understand something.

"Do you understand?"

"Yes."

"Why does increasing temperature increase the rate of reaction?"

That requires the understanding to be demonstrated.

Do Not Revise Only What You Enjoy

Students naturally gravitate towards topics they already understand.

This is hardly surprising.

Getting questions right feels good.

Struggling through something difficult does not.

A student might spend an evening happily completing straightforward algebra while carefully avoiding circle theorems.

Or spend hours revising cell structure while avoiding inheritance.

Or repeatedly practise familiar mechanics calculations while ignoring electricity.

The result is plenty of revision activity without addressing the weakness that may actually determine the examination grade.

A useful revision question is therefore:

"What am I most tempted not to revise?"

That is often an excellent place to start.

A Simple Experiment Students Can Perform on Themselves

Here is an experiment I would encourage students to try.

It requires no specialist equipment and takes only a few days.

Choose two topics of roughly equal difficulty that you have already encountered but do not know particularly well.

Call them Topic A and Topic B.

Topic A — Passive Revision

Spend 30 minutes revising Topic A by:

rereading notes;
looking through the textbook;
highlighting;
reviewing worked examples.

Stop after 30 minutes.

Topic B — Active Revision

Spend 30 minutes on Topic B.

But this time:

read the material briefly;
close the book;
write what you remember;
answer questions;
explain the topic aloud;
check your answers;
correct your mistakes;
test yourself again.

Again, stop after 30 minutes.

Now do something very important.

Leave both topics alone for 48 hours.

Do not deliberately revise either one.

After 48 hours, give yourself a test on both topics.

Ideally use:

ten short questions;
several definitions;
one explanation question;
one application question;
calculations where appropriate.

Mark both tests.

The result can be surprisingly revealing.

Students often discover that the topic which felt harder to revise is the one they remember better.

Why?

Because difficult retrieval was forcing the brain to practise the thing it would later need to do.

Retrieve the information.

Effective Revision Often Feels Harder

This is one of the strange features of learning.

Poor revision can feel good.

Effective revision can feel uncomfortable.

Reading something for the fifth time produces familiarity.

Trying to recall it with the book closed produces uncertainty.

Attempting an examination question exposes mistakes.

Explaining something aloud exposes gaps.

Being tested can feel frustrating.

Yet those are often precisely the activities producing the greatest learning.

Students therefore need to stop judging revision entirely by how comfortable it feels.

Some struggle is useful.

The Difference Between Testing and Judging

Parents sometimes worry that constantly testing their child will increase examination pressure.

There is an important distinction here.

Testing does not have to mean judging.

A ten-question quiz can simply be a diagnostic tool.

If a student scores 4/10, that does not necessarily mean:

"You are bad at this."

It means:

"We have identified six things worth revising."

That is useful information.

In fact, discovering weaknesses several months before an examination is considerably better than discovering them during the examination itself.

Try the Five-Minute Recall Test

Parents can use a very simple question:

"Tell me what you learned today."

Not:

"What did you revise?"

That may produce:

"Biology."

Instead ask:

"What can you tell me about what you revised?"

A student who has spent an hour on respiration might be able to explain:

aerobic respiration;
anaerobic respiration;
the word equation;
where respiration occurs;
why respiration is important;
oxygen debt;
differences between respiration and breathing.

That is evidence of learning.

If the answer is:

"I don't really remember, but I read the chapter",

then the hour may not have been as productive as it appeared.

Revision Should Produce Something

One useful rule is that an effective revision session should usually leave some evidence behind.

Not necessarily beautiful notes.

It might leave:

ten completed questions;
a marked past-paper section;
a page of recalled information;
corrected calculations;
flashcards containing difficult material;
a list of mistakes;
an improved essay paragraph;
questions the student has discovered they cannot answer.

The evidence shows that the student has interacted with the material rather than merely looked at it.

Use Flashcards Properly

Flashcards can be excellent.

They can also become another form of passive reading.

Reading the question and immediately turning over the card does very little.

Instead:

Read the question.

Stop.

Say or write the answer.

Only then turn the card over.

If the answer was wrong, that card should return sooner.

If the answer was easy, it can wait longer before appearing again.

The value of the flashcard is not the information printed on it.

The value comes from forcing the brain to retrieve the information before seeing the answer.

Revision Is Different in Different Subjects

There is no single perfect revision technique.

Different subjects require different forms of practice.

Mathematics

Students need to solve problems.

Not merely read worked solutions.

Physics

They need calculations, explanations, graphs, practical interpretation and application.

Chemistry

They need equations, calculations, mechanisms, explanations, practical methods and precise terminology.

Biology

They need accurate vocabulary, processes, explanations, data interpretation and application to unfamiliar situations.

English

They need to analyse language, construct arguments, retrieve quotations and practise writing.

Psychology and Sociology

They need knowledge, terminology, studies, evidence, evaluation and the ability to construct structured arguments.

The common principle is that revision should resemble the type of thinking the examination will eventually demand.

A Better One-Hour Revision Session

Compare these two evenings.

Evening One

60 minutes:

Read Biology notes.

Highlight important parts.

Look through textbook diagrams.

Everything feels familiar.

Finished.

Evening Two

10 minutes — quickly review the topic.

15 minutes — close everything and write what you remember.

15 minutes — complete examination questions.

10 minutes — mark them carefully.

5 minutes — write down mistakes.

5 minutes — explain the hardest idea aloud.

Both students can truthfully say:

"I revised Biology for an hour."

But the learning experience has been completely different.

Parents Should Ask About Outcomes, Not Hours

This also changes the conversation parents can have with their children.

Instead of:

"How many hours have you revised today?"

try:

"What can you do now that you couldn't do this morning?"

That is a much more interesting question.

Perhaps:

"I can now solve quadratic equations."

"I finally understand electromagnetic induction."

"I can explain how vaccines produce immunity."

"I learned the stages of mitosis."

"I realised that I keep forgetting units in calculation questions."

"I completed half a past paper and corrected six mistakes."

Those answers tell us considerably more than:

"I revised for three hours."

The Goal Is Not to Spend More Time Revising

Students are already under considerable pressure.

The solution is not necessarily to tell them to sit at their desks for even longer.

Often the better solution is to make the time they already spend more effective.

Thirty minutes of concentrated retrieval and question practice may achieve considerably more than two hours of distracted rereading.

That does not mean rereading has no place.

It can be useful when first learning or refreshing material.

But it should usually be followed by something more demanding.

Close the book.

Retrieve.

Calculate.

Explain.

Answer.

Mark.

Correct.

Repeat.

The Most Important Question

The next time your child says:

"I've been revising for two hours,"

there is no need immediately to ask them to revise for a third.

Instead, ask:

"What can you remember without looking?"

That single question gets remarkably close to the heart of effective revision.

Because examinations are ultimately closed-book retrieval exercises.

The student will eventually sit down with a paper containing questions they have never seen before.

Their beautifully highlighted notes will not be beside them.

Their textbook will not be open.

They will have to retrieve knowledge, apply it and communicate it accurately.

So revision should practise exactly that.

Do not measure revision simply by the amount of time spent looking at information.

Measure it by what the student can now retrieve, explain, calculate and apply.

Because time spent revising and learning achieved are not necessarily proportional.

The real question is not:

"How long did you revise?"

It is:

"What have you learned?"

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Tuesday, 8 September 2026

From Hidden Organist to Unforgettable Concert — How Video Can Transform an Organ Recital

There is a curious problem with organ concerts.

The instrument may be enormous. The sound can fill an entire church. The music can range from the quietest flute stop to a thunderous full-organ climax that seems to shake the building.

Yet the person actually creating all of this can be almost completely invisible.

In many churches and concert halls the organist is tucked away in an organ loft, behind the audience, around a corner, behind the pipes or high above the nave.

The audience hears a remarkable performance.

But they often cannot see it.

And that is a considerable shame, because playing an organ is one of the most visually fascinating forms of musical performance.

The hands can be moving across two, three or even four manuals. The feet are simultaneously playing an entirely separate keyboard. Stops are being changed. Pistons are being pressed. Registration changes alter the character of the instrument from one moment to the next.

Put a few well-positioned cameras around the organ console and project those pictures onto a large screen, and suddenly the audience discovers that an organ concert is not simply something to hear.

It becomes something to watch.

And that can completely change the experience.

The Problem with the Traditional Organ Concert

If you go to see a pianist, you can usually see the pianist.

At an orchestral concert, you can see the conductor, the violinists, the brass players and the percussion section.

At a rock concert, enormous screens may show close-ups of the guitarist's hands, the drummer or the singer.

But at an organ recital, it is quite possible to spend an hour looking at an apparently empty organ case while the performer is hidden somewhere else in the building.

That does not make the music any less impressive.

But it does remove an important part of the connection between performer and audience.

We naturally like to see how music is being produced.

Watching somebody perform helps us appreciate the skill involved.

And with an organ there is an extraordinary amount of skill to see.

An Organ Is Almost an Orchestra Controlled by One Person

For somebody who has never sat at a large organ console, the first sight of one can be quite surprising.

There might be several keyboards stacked one above another.

Below those keyboards is another keyboard played with the feet.

Around the console there may be dozens, or sometimes hundreds, of stops.

There may also be expression pedals, combination pistons, couplers and other controls.

The organist is therefore doing far more than simply pressing keys.

One hand might be playing a melody on one manual.

The other may be providing accompaniment on another.

The feet may be playing a bass line on the pedals.

At the same time the organist may be preparing the next registration change.

To somebody sitting in the nave who can only hear the result, much of this activity is invisible.

A camera changes that immediately.

Put a Camera Above the Manuals

Perhaps the most obvious camera position is looking down towards the keyboards.

This lets the audience see the organist's hands moving between the manuals.

For an accessible piece of music, the hands may remain mostly on one keyboard.

Then something more complicated begins.

Suddenly the right hand moves to the Choir or Swell while the left stays on the Great.

A few seconds later both hands move.

A thumb reaches down to another manual.

A piston is pressed.

The sound changes.

Even somebody who knows nothing about organs begins to understand that this is a very physical instrument to play.

For organists and musicians in the audience, the view is even more interesting.

They can see fingering, manual changes and registration techniques that would otherwise remain completely hidden.

Then Show the Pedals

If there is one camera angle that frequently surprises a non-organ-playing audience, it is the pedalboard.

Most people understand that an organ has pedals.

What they often do not realise is just how much music is actually being played with the feet.

An organ pedalboard is essentially a large keyboard arranged for the organist's feet.

And in some repertoire, the pedal part is extremely demanding.

Show a close-up of the organist's feet during a Bach fugue and suddenly people start looking at the performance very differently.

They may see alternate toes and heels being used.

They may see one foot passing behind or in front of the other.

They may watch the organist apparently running along the pedalboard while the hands are simultaneously playing completely independent parts.

The reaction is often something along the lines of:

"I didn't realise they were doing all that with their feet."

Exactly.

That is why the camera is there.

Don't Forget the Stops

The stops are another important part of the performance.

An organ is not simply one sound played loudly or quietly.

Different stops bring different ranks of pipes into use.

Principals, flutes, strings, reeds and mixtures each have their own character.

Couplers can join divisions together.

An organist therefore effectively designs the sound of the instrument as the music progresses.

Sometimes those changes happen between pieces.

Sometimes they happen during the music itself.

With a suitable camera angle, the audience can watch a hand leave the keyboard for a moment, pull a stop or press a piston and then return to the keys.

Almost immediately the sound changes.

The audience can see cause and effect.

That makes the organ easier to understand.

It also makes the performance more engaging.

One Camera Is Useful. Several Are Much Better

A simple installation might begin with one camera.

But a really effective organ concert can use several.

For example:

Camera 1: a general view of the organist and console.
Camera 2: an overhead or angled shot of the manuals.
Camera 3: a close-up of the pedalboard.
Camera 4: a view of the stop jambs.
Camera 5: a wider shot showing the organ case or church interior.
Camera 6: perhaps a view from the nave showing the audience and screen.

These do not all have to be expensive cinema cameras.

Depending upon the venue and production requirements, compact cameras, PTZ cameras or suitable fixed cameras can work extremely well.

The important part is choosing camera positions that actually tell the story of the performance.

Live Vision Mixing Makes an Enormous Difference

Once several cameras are available, somebody can vision-mix the concert live.

That means selecting the most interesting picture at the appropriate moment.

During a delicate passage, perhaps we remain on the organist's hands.

When the pedals become particularly active, cut to the pedal camera.

When a dramatic registration change approaches, perhaps show the wider console.

At the end of the piece, move to the wide shot as the organist finishes and acknowledges the audience.

Now the video is no longer merely documenting the concert.

It is interpreting it.

Good live production should help the audience understand what is happening without becoming distracting.

The pictures should support the music rather than compete with it.

The Screen Changes the Relationship with the Audience

This is perhaps the most important point.

A large screen allows somebody sitting many metres away from the organ to feel surprisingly close to the performer.

You can see fingers moving.

You can see feet moving.

You can see concentration on the organist's face.

You can see registration changes.

Suddenly the performer is no longer an invisible musician somewhere behind the pipes.

There is a human connection.

And that matters.

Music is partly about sound, but performance is also about people.

It Can Make Organ Music More Accessible

There is another important benefit.

Organ enthusiasts already understand what is happening.

The wider public often does not.

A visitor may look at a large organ console and simply see an intimidating collection of keyboards and switches.

Showing those controls being used during an actual performance gives them meaning.

The pedalboard is no longer a strange piece of wooden furniture.

It is the bass keyboard.

The stops are no longer decorative knobs.

They select different sounds.

The multiple manuals are not duplicate keyboards.

They allow different sections of the organ to be controlled independently.

Without stopping the concert for a technical lecture, the audience begins learning how the instrument works simply by watching it being played.

Think About the Sound as Carefully as the Pictures

Of course, filming an organ concert is not only about cameras.

Audio matters enormously.

An organ is an acoustic instrument designed to work with the building around it.

Simply placing a microphone next to the organ console may therefore give a rather disappointing result.

You are likely to hear mechanical noises, key action and perhaps the organist moving, while failing to capture the full majesty of the instrument in the building.

Microphones placed further into the church can capture much more of the balance between direct sound and reverberation.

Depending upon the building, additional microphones might be useful for particular purposes.

The aim is not necessarily to create the closest possible sound.

It is to capture something resembling what the audience experiences in the room.

The Building Is Part of the Performance

This is particularly important with an organ.

A church is not simply somewhere convenient to put the instrument.

The building is part of the acoustic system.

Play a chord.

The organ pipes speak.

The sound travels through the church.

Reflections arrive from the walls, roof, floor and pillars.

Then the sound slowly decays.

That reverberation is part of the character of the instrument.

Video production should therefore show some of the building as well.

A wide camera showing the nave, organ case, stained glass or architectural detail helps remind the viewer that this is not an electronic sound produced in isolation.

The organ and building work together.

Recording the Concert Creates Another Opportunity

Once the concert is being mixed for the screen, recording it becomes a natural next step.

A multi-camera recording can create:

a complete concert film;
individual pieces for YouTube;
short social media clips;
promotional material for future concerts;
material for the organist's portfolio;
archive footage for the church;
educational videos explaining particular pieces or techniques.

A single performance can therefore continue reaching people long after the audience has gone home.

Someone who could not attend the concert may watch it later.

A short clip showing an extraordinary pedal passage may introduce somebody to organ music for the first time.

And that is where video can do more than simply document an event.

It can help build an audience.

The Technical Challenge Is Part of the Fun

There are some interesting production problems to solve.

Organ lofts are not always designed with television crews in mind.

Space can be extremely limited.

Camera positions must not obstruct the organist.

Cables need to be routed safely.

Lighting must be sympathetic to the church.

Some consoles are brightly illuminated while others are very dark.

Automatic exposure can struggle when a camera sees bright sheet music surrounded by darker woodwork.

Camera angles also need careful thought.

A pedal camera placed in the wrong position can show almost nothing useful.

A hand camera placed too low may be blocked by the organist.

So there is a certain amount of experimentation involved.

For me, that is one of the enjoyable parts of this kind of project.

It brings together music, cameras, sound engineering, lighting, live production and technology.

You Don't Need to Turn the Church into a Television Studio

The objective is not to fill a beautiful church with equipment.

Quite the opposite.

A good installation should almost disappear.

Small cameras can often be positioned discreetly.

Cables can be routed carefully.

The large screen becomes the part the audience notices.

The technology should serve the concert rather than becoming the concert.

That distinction is important.

If people spend the evening admiring the video equipment, something has probably gone wrong.

If they leave saying:

"I had no idea an organist did so much at once,"

then the production has succeeded.

From an Organ Concert to an Event People Talk About

A traditional organ recital can already be a magnificent musical experience.

But adding thoughtful live video can reveal an entire part of the performance that audiences have historically been unable to see.

Show the hands.

Show the feet.

Show the stops.

Show the concentration of the performer.

Show enough of the church to give the instrument a sense of place.

Then allow the audience to connect the movement they see with the extraordinary sounds they hear.

Suddenly the organist is no longer hidden away somewhere behind an organ case.

The performance becomes visible.

The instrument becomes understandable.

And the concert becomes far more immersive.

Sometimes improving a live event does not mean changing the performance at all.

It simply means allowing the audience to see what was there all along.

Perhaps that is the secret to turning a very good organ concert into one people leave talking about — and one they want to come back and experience again.

Monday, 7 September 2026

The Five Most Common Ways Students Lose Easy Marks in Science Exams

Some lost marks have very little to do with not knowing the science.

One of the most frustrating things I see when marking science work is a student who clearly understands the topic, has remembered the relevant facts, and may even have carried out the calculation correctly — yet still does not receive all the marks.

Sometimes the problem is surprisingly small.

The student forgets the unit.

They quote a calculator answer to eight decimal places when the question asks for three significant figures.

They describe a graph perfectly but never explain why the pattern occurs.

They make a sensible scientific statement but fail to use the data printed directly in front of them.

Or, perhaps most frustratingly of all, they answer the question they expected to see rather than the one that was actually asked.

These are not necessarily failures of scientific knowledge.

They are failures of exam technique.

And that distinction matters.

A student can spend another hour revising photosynthesis, electricity or forces and still continue losing the same marks unless someone identifies exactly how those marks are disappearing.

Over many years of teaching and tutoring, I have increasingly found that one of the most useful things we can do is stop asking only:

"Does the student know the science?"

and start asking:

"Can the student turn that knowledge into marks?"

Here are five of the most common ways students fail to do precisely that.

1. Forgetting the Unit

This must be one of the easiest marks to lose.

A student completes a calculation perfectly.

They substitute the correct values.

They rearrange the equation correctly.

Their calculator gives the right numerical answer.

And then they write:

rather than:

12 V

or:

12 N

or:

12 m/s

depending upon the question.

The science may be completely correct, but the answer is incomplete.

Why units matter

A number without a unit often has surprisingly little meaning.

Suppose I ask:

What is the speed of the object?

A student answers:

Twenty what?

20 metres?

20 seconds?

20 metres per second?

20 kilometres per hour?

The unit is part of the scientific information.

This is particularly important in physics, but it appears throughout science.

Students might encounter:

metres, m;
seconds, s;
metres per second, m/s;
newtons, N;
joules, J;
watts, W;
volts, V;
amperes, A;
ohms;
kilograms, kg;
grams, g;
cubic centimetres, cm3;
moles, mol;
grams per cubic decimetre, g/dm3.

A very simple example

Imagine a GCSE Physics question:

A car travels 150 m in 10 s.

Calculate its average speed.

The calculation is:

speed = distance / time

speed = 150 / 10

speed = 15 m/s

Writing simply 15 risks throwing away a mark that required virtually no additional scientific knowledge.

The habit I encourage

Before moving to the next question, look at the answer and ask:

"What is this number measuring?"

If you can answer that question, you can usually identify the unit.

Another useful habit is to write the unit beside the numerical value while carrying out the calculation rather than trying to remember it afterwards.

For example:

distance = 150 m

time = 10 s

speed = 150 m / 10 s

speed = 15 m/s

This makes forgetting the unit much less likely.

2. Ignoring Significant Figures or Decimal Places

Calculators are extraordinarily good at producing numbers.

Unfortunately, calculators do not know how many of those numbers you should write down.

Suppose a calculation gives:

4.736842105

That may be what appears on the screen.

It is rarely what belongs on the examination paper.

The question may specifically say:

Give your answer to 3 significant figures.

The correct answer would therefore be:

4.74

Writing 4.736842105 is not more scientifically impressive.

In fact, it may be incorrect.

Significant figures and decimal places are not the same

Students sometimes confuse the two.

Consider:

0.004763

To 2 significant figures:

0.0048

The first significant figure is the 4.

But to 2 decimal places:

0.00

These are very different instructions.

Another example:

12.746

To 2 decimal places:

12.75

To 2 significant figures:

Students need to recognise which instruction they have been given.

Why this matters scientifically

Precision communicates something about the reliability of a measurement.

If a ruler measures only to the nearest millimetre, reporting the result as:

12.347826 cm

would suggest a level of precision that simply was not present in the original measurement.

Examiners are therefore not being unnecessarily fussy when they ask for sensible rounding.

They are testing whether the student understands how scientific measurements are reported.

A useful examination rule

Unless the question gives another instruction, students should usually avoid rounding intermediate stages too aggressively.

Keep several figures in the calculator and round the final answer.

For example:

If:

energy = 4.673 x 2.18

do not unnecessarily round 4.673 to 4.7 before completing the calculation.

Use the accurate values first and round at the end.

3. Failing to Quote the Data

This is enormously common in biology, chemistry and physics.

A question provides a table or graph.

The student correctly identifies the trend.

They write:

"The rate increases as temperature increases."

Scientifically, that may be perfectly reasonable.

But the question might say:

"Use data from the graph to describe the relationship."

Now the examiner expects evidence.

A stronger answer might be:

"As the temperature increases from 20 degrees C to 40 degrees C, the reaction rate increases from 8 units to 21 units."

The student has now demonstrated that they actually used the information supplied.

The difference between an observation and evidence

Consider a biology investigation into enzyme activity.

A student writes:

"The enzyme works faster at higher temperatures."

That may earn something.

But:

"The reaction rate rises from 3.2 units at 20 degrees C to 7.8 units at 40 degrees C."

is much stronger.

The second answer supports the statement with evidence.

Look for instructions such as:

use data from the table;
use values from the graph;
give evidence from the results;
compare the results;
calculate the difference;
calculate the percentage change.

Whenever students see those phrases, numbers should immediately come to mind.

A particularly common comparison problem

Suppose one treatment produces:

84 seedlings

and another:

56 seedlings.

Writing:

"More seedlings grew in treatment A."

is true.

But the examiner may expect something such as:

"Treatment A produced 84 seedlings compared with 56 in treatment B, an increase of 28 seedlings."

Depending upon the question, the student might even calculate:

percentage increase = increase / original value x 100

percentage increase = 28 / 56 x 100

percentage increase = 50%

Now the comparison is much more precise.

My advice to students

If the question gives you numbers, there is often a reason.

Use them.

4. Confusing "Describe" with "Explain"

This is one of the biggest exam-technique problems in science.

The two words may sound similar in everyday conversation.

In an examination, they usually require very different answers.

Describe means: What happens?

Suppose a graph shows the rate of photosynthesis as light intensity increases.

A description might say:

"The rate of photosynthesis increases rapidly at first and then levels off."

That tells us what the graph shows.

Explain means: Why does it happen?

An explanation might say:

"At low light intensity, light is the limiting factor, so increasing light intensity increases the rate of photosynthesis. At higher light intensities another factor, such as carbon dioxide concentration or temperature, becomes limiting, so the rate levels off."

Now we have explained the mechanism.

Another example: resistance and temperature

Question:

Describe what happens to the resistance of a filament lamp as the current increases.

Possible answer:

"The resistance increases."

Question:

Explain why the resistance increases.

Now we need something more like:

"As the current increases, the filament becomes hotter. The metal ions vibrate more strongly, causing more collisions with the moving electrons, so the resistance increases."

The second question requires physics.

The first does not necessarily require the mechanism at all.

Command words are instructions

Students often treat command words as decoration.

They are not.

Words such as:

state;
give;
identify;
describe;
compare;
explain;
calculate;
determine;
evaluate;
suggest;

tell the student what sort of answer is required.

One of the most useful exam habits is therefore remarkably simple:

Underline the command word.

Before answering, decide what it is asking you to do.

5. Giving a Correct Scientific Answer That Does Not Answer the Question

This is perhaps the most important of all.

A student sees a familiar topic.

They recognise a keyword.

Their memory activates.

And they start writing everything they know.

Unfortunately, the examiner did not ask for everything they know.

An example from biology

Imagine the question asks:

"Explain why vaccination can reduce the spread of a communicable disease through a population."

A student writes:

"Vaccines contain antigens from a pathogen. These stimulate lymphocytes to produce antibodies and memory cells."

That is good biology.

But has the student fully answered the question about reducing spread through a population?

Not yet.

They need to connect individual immunity to transmission.

A stronger answer might continue:

"If a large proportion of the population is immune, infected individuals are less likely to encounter susceptible people. This reduces transmission and can provide some protection to people who are not immune."

Now the answer addresses the actual question.

An example from chemistry

Question:

"Explain why increasing the concentration of hydrochloric acid increases the rate of reaction with magnesium."

Student answer:

"Particles move randomly."

True.

But insufficient.

A better answer:

"Increasing the concentration means there are more acid particles per unit volume. This produces more frequent successful collisions with the magnesium surface, so the reaction rate increases."

Again, the student needs to make the complete logical connection.

An example from physics

Question:

"Explain why using a higher potential difference increases the current through a fixed resistor."

A student might write:

"Current is measured in amperes."

Scientifically correct.

Completely irrelevant.

Knowing science is not enough.

You have to select the science that answers the question.

The Dangerous Habit of Keyword Answering

This is something I frequently try to identify during tuition.

A student sees:

"photosynthesis"

and immediately writes something about chlorophyll.

They see:

"electricity"

and write V = IR.

They see:

"enzymes"

and write about active sites.

All of those things might be correct.

But examination questions are increasingly designed to test whether students can apply ideas rather than simply reproduce memorised paragraphs.

The better habit is:

Read the whole question.
Identify the command word.
Identify the scientific topic.
Identify the specific context.
Look at the number of marks available.
Build the answer around what has actually been asked.

That short pause can save a remarkable number of marks.

Use the Number of Marks as a Clue

The mark allocation is useful information.

If a question is worth one mark, the examiner probably does not want a page of writing.

If it is worth four marks, a one-sentence answer is unlikely to be enough.

Consider:

Explain how insulation reduces energy transfer from a house. [4 marks]

A student writing simply:

"Insulation keeps the house warm."

has probably not done enough.

They might need to discuss particular mechanisms:

reducing conduction through walls;
trapping air;
reducing convection;
reflective surfaces reducing infrared radiation.

The number of marks gives a rough indication of how much scientific content is expected.

It does not always correspond to exactly one sentence per mark, but it is an extremely useful warning system.

A Practical Checking Routine Before Moving On

I encourage students to develop a quick final check.

It does not need to take long.

Ask:

1. Did I answer the command word?

If it says explain, have I given a reason?

If it says describe, have I stated the pattern?

2. If there was data, did I use it?

Have I quoted appropriate values?

3. If I calculated something, did I include the unit?

4. Did the question specify significant figures or decimal places?

5. Have I answered this question rather than simply written something I know about the topic?

That entire check can sometimes take only a few seconds.

Yet across a complete GCSE or A Level paper, those few seconds can protect a surprisingly large number of marks.

The Importance of Showing Working

There is another reason I encourage students not simply to type everything into a calculator and write down the final number.

Examiners can often award method marks.

Suppose the correct calculation is:

power = energy / time

A student writes:

power = 18,000 / 120

power = 150 W

If the final arithmetic goes wrong but the method is correct, some marks may still be available.

Compare that with a student who writes only:

137 W

with no working.

The examiner has very little evidence of what the student attempted.

Showing working is therefore not simply for the teacher.

It can protect marks.

Why Practice Papers Alone Are Not Always Enough

Students are often told:

"Do more past papers."

That can certainly help.

But there is an important limitation.

If a student repeatedly makes the same exam-technique mistake, simply completing more papers can mean practising that mistake again and again.

A student who habitually forgets units might complete six papers and forget units six times.

A student who never quotes data may continue writing vague descriptions.

A student who misinterprets "explain" may continue producing descriptive answers.

The important stage is not simply doing the paper.

It is analysing why marks were lost.

When I go through a paper with a student, I am interested not only in the total mark but in the pattern.

Was the science unknown?

Was the equation forgotten?

Was the question misread?

Was the unit missing?

Was the response too vague?

Was evidence missing?

Was the student answering from memory instead of reading the question?

Those are very different problems and require very different solutions.

Create a "Lost Marks" List

One practical technique I particularly like is keeping a short record of avoidable mistakes.

For example:

My Lost Marks List

Forgot units.
Rounded too early.
Did not quote graph values.
Described instead of explained.
Did not read the final sentence of the question.
Forgot to show working.
Used vague wording such as "it" and "things".
Did not compare both sets of data.

The list should be personal.

After several papers, patterns usually begin to appear.

Perhaps the student discovers that they have lost nine marks across three papers simply because of missing units.

That is valuable information.

Fixing that habit is potentially much easier than learning an entirely new topic.

Parents Can Help Without Teaching the Science

This is also an area where parents can sometimes provide useful support even if they have not studied science for decades.

You do not necessarily need to know whether the scientific explanation is correct.

You can still ask:

"What exactly is the question asking you to do?"

"Where have you used the figures from the graph?"

"What unit should that answer have?"

"The question says explain. Where is the reason?"

"It is worth three marks. Have you given enough information?"

Those questions encourage examination discipline without requiring the parent to become a physics, chemistry or biology teacher.

Knowledge and Examination Skill Are Different Things

There is an important lesson here.

Science examinations do not simply test what students know.

They also test whether students can:

interpret information;
select relevant knowledge;
communicate precisely;
work with data;
perform calculations;
follow instructions;
construct explanations;
apply ideas to unfamiliar situations.

That is why a student can walk out of an examination saying:

"I knew all of that!"

and still be disappointed by the result.

They may genuinely have known it.

But marks are awarded for what appears on the examination paper, not for what was present somewhere inside the student's head.

Conclusion: Sometimes the Fastest Improvement Is Not More Revision

Revision matters enormously.

Students need secure scientific knowledge.

They need to understand equations, processes, practical methods and key terminology.

But there comes a point where simply learning more facts produces diminishing returns.

Sometimes the quickest improvement comes from protecting the marks that the student was already capable of earning.

Remember the unit.

Round properly.

Quote the data.

Respect the command word.

Answer the question that is actually on the page.

None of these techniques is particularly glamorous.

They will not replace proper scientific understanding.

But over the course of a full examination paper they can make a substantial difference.

And perhaps that is one of the most useful lessons we can teach students about examinations:

You do not always need to know more science to gain more science marks. Sometimes you simply need to show the examiner more clearly what you already know.